The Rise and Fall of Rome, 264 BC – AD 476 — the study guide

CHAPTER 1 · 264–241 BC · 264 BC

The Republic and Its Rival

To understand why Rome could endure a long war, consider the way it had brought Italy under its control. Over the previous two centuries, defeated peoples became allies. They retained their governments, but when Rome called, they supplied troops. A generation after the war, the Greek historian Polybius reckoned that the network could field more than 700,000 men of fighting age. Rome could draw on far more soldiers than the population of the city itself.

Carthage had a different strength. Its trade financed a formidable fleet and paid professional soldiers from many nations. That wealth made it a dangerous opponent, especially at sea. But hired forces and their supplies depended on a continuing flow of money and on access to ports. Each state had to keep its own system working through years of losses.

The immediate dispute arose at Messana, on the strait facing Italy. Mercenaries who had seized the city appealed to both powers for protection. Rome’s assembly saw the prospect of spoils and voted to intervene; its legions crossed the sea for the first time. Neither power had planned a great war, but each had reason to fear a rival established at the crossing. What began as a local quarrel became twenty-three years of fighting, much of it on water where Carthage had the experience Rome lacked.

Rome first had to acquire a fleet. According to the ancient account, it copied a wrecked Carthaginian warship. It then had to replace fleets as well: enemy skill and Mediterranean storms destroyed hundreds of vessels and killed tens of thousands of men. Rome found crews and funds to continue, while Carthage could not match that rhythm of replacement. Defeat at the Aegates Islands in 241 BC brought Carthage to peace.

The settlement gave Rome Sicily, and the way it held the island marked a change. An Italian ally kept its community and supplied soldiers; Sicily became a province governed and taxed directly from Rome, rather like a distant colony ruled from a home capital. Roman conquest could now bring revenue and overseas territory as well as military allies. The machinery of empire was taking shape.

WHY IT HAPPENED

The socii system: manpower as a constitution. Rome defeated Italian communities, but generally left their laws and local government intact. In return they supplied troops, and some gained citizenship. This arrangement gave Rome a continuing military network of former opponents; the advances shown over the next four centuries of this atlas depended on it.

Two ambitious magistrates a year. Two consuls were elected each year. For a Roman aristocrat, a short term of command offered a chance to win glory in battle, while assemblies could hope for spoils. Annual elections also meant that a defeat need not end the Republic’s war effort with the loss of one commander: another consul could take command.

Sicily: the strait with no owner. Messana lay about three miles from Italy. To Rome, a Carthaginian garrison placed a rival close to its allies. To Carthage, Roman troops there stood near its Sicilian positions. A move either side saw as protective could look threatening to the other.

What Pyrrhus taught everyone. Pyrrhus defeated Rome at Heraclea and Asculum with a highly capable hired army. Yet victory cost him men he found difficult to replace, while Rome could raise further forces. The saying attributed to him captures the problem: “Another such victory and we are undone.” Carthage would encounter Rome’s capacity to recover in a long war at sea.

WHAT IT CHANGED

Rome becomes a naval power in five years. Rome adapted its land forces to fighting at sea. According to the ancient account, a wrecked Carthaginian quinquereme supplied the model for more than 100 warships. The corvus, a boarding bridge, allowed Roman infantry to fight on enemy decks. Within five years the Republic had acquired a new naval capacity.

The first provincia. Sicily was placed under a Roman governor and taxed as a possession. The provincial model would yield tribute and revenue through tax farming, while giving governors extensive power. It created opportunities for abuse that became a recurring problem for the Republic.

Carthage’s revenge takes root in Spain. After losing Sicily, Carthage surrendered Sardinia in 238 BC while occupied by a mercenary revolt; watch the islands change on the map. The Barcid family then built power in Hispania, drawing on resources that included silver. Ancient accounts say Hamilcar Barca made his nine-year-old son swear eternal enmity to Rome. His son was Hannibal.

DISCUSSION QUESTION

Rome and Carthage had been allies against Pyrrhus just fourteen years earlier. Why did a dispute over one Sicilian city lead to twenty-three years of war?

The Mamertines’ appeal placed the choice before two expanding powers with interests on opposite sides of a narrow sea. Each could fear the other’s garrison at Messana. Roman consuls had reason to seek military glory and the assembly could hope for spoils; Carthage had interests in Sicily and in the sea routes supporting its trade. Historians have emphasized the structural danger in that encounter. It still took repeated decisions to continue, including the building of further fleets, to make the struggle last twenty-three years.

AN INTERESTING FACT

Archaeologists have raised some two dozen bronze warship rams from the seabed off the Aegates Islands over the past two decades. The waters preserve the first ancient sea-battle site to be found, where the war ended in 241 BC. Several rams bear Latin inscriptions naming the Roman quaestors who approved them for service; at least one carries a Punic dedication invoking Baal. Both navies left evidence on the sea floor.

CHAPTER 2 · 218–201 BC · 216 BC

The Punic Wars: Hannibal

Hannibal began his invasion far from Rome. In 218 BC he led an army from Carthaginian Spain across the Rhône and over the Alps in autumn snow. Most of his men were lost on the journey, and perhaps 26,000 reached Italy. The crossing makes sense as part of a political plan: victories on Italian soil might convince Rome’s allies that Rome could no longer protect them, and persuade them to leave the alliance that furnished its armies.

Hannibal gave those communities reason to take notice. At the Trebia, he lured a Roman army across an icy river and destroyed it. At Lake Trasimene, another army was trapped in fog; its consul died with it. Then, at Cannae in 216 BC, Hannibal let his center give way deliberately while his cavalry closed around the Roman flanks. The largest army Rome had yet fielded was annihilated. Ancient estimates of the dead range from about 48,000 to 70,000. Much of southern Italy defected, and by the ordinary expectations of ancient warfare Rome might have been expected to make peace.

The Senate chose to continue. It refused to negotiate or ransom captured soldiers, and Rome raised fresh legions by recruiting below the usual property qualification and arming enslaved men with a promise of freedom. Most central Italian allies stayed loyal. Intermarriage, shared citizenship and the prospect of future gain connected them to Rome. Hannibal had identified the alliance as the source of Roman strength, but even Cannae did not bring its core over to him.

Rome could now pursue the war on several fronts. Fabius avoided the pitched battles Hannibal wanted and wore down his forces in Italy. Elsewhere, Roman armies attacked the resources that supported Carthage. Scipio took New Carthage in Spain in 209 BC, cutting off silver and reinforcements. In 204 he landed in Africa and won Numidian cavalry to his side. Carthage needed Hannibal at home; he left Italy and was defeated by Scipio at Zama in 202 BC.

Carthage emerged from the peace as a disarmed client burdened by a vast indemnity, and Rome dominated the western Mediterranean. The long struggle had changed Italy too. Farms were devastated, captives enslaved in great numbers, and generals such as Scipio had held extraordinary commands for long periods. Victory left pressures on Italian society and on republican rules meant to prevent too much power from gathering in one man’s hands.

WHY IT HAPPENED

A treaty written in resentment. Carthage’s defeat brought heavy peace terms in 241 BC. Three years later, while Carthage fought its mutinous mercenaries, Rome took Sardinia. Polybius regarded Roman conduct over Sardinia as a major cause of the later war. In Spain the Barcids built a new base, drawing on silver and men that could support recovery and another contest with Rome.

Saguntum: the tripwire city. Saguntum was under Roman protection, although the Spanish city lay south of the river used in an agreement defining Carthaginian expansion. Hannibal captured it in 219 BC. Rome demanded that Carthage surrender him; the Carthaginian council stood by him. The rival commitments over Saguntum became the immediate occasion for war.

Hannibal’s theory of victory. Hannibal’s plan depended on separating Rome from its allies. He defeated legions and freed Italian prisoners without ransom to persuade their communities that they could leave. Some did. Others, particularly in central Italy, had ties of law, citizenship in some communities, intermarriage and shared interests that victories alone could not sever.

Command by committee, annually. Annual consular elections gave Rome a succession of commanders, but also allowed men such as Varro at Cannae to offer Hannibal the pitched battles he wanted. Rome adapted: Fabius and Marcellus received repeated commands, and Scipio, a private citizen, received an extraordinary proconsular command. These measures helped sustain the war and set precedents for later ambitious commanders.

WHAT IT CHANGED

The Mediterranean’s center of gravity moves west. With Carthage reduced to a disarmed client, Rome became the dominant naval power in the western Mediterranean. Numidia under Masinissa allied with Rome and put persistent pressure on Carthage; watch the African hinterland change color on the map. Control in Spain also gave Rome access to silver for later wars.

A generation trained by catastrophe. Soldiers and commanders acquired extensive experience during seventeen years of fighting Hannibal. They also gained confidence in Rome’s capacity to prevail after catastrophe. Within three years of Zama, Rome was fighting Macedon: the Hellenistic east was meeting the winner of the western struggle.

Italy’s countryside begins to change. Armies living off Italy devastated farms and smallholders. War captives were enslaved, and wealthy landowners acquired estates. Historians from Appian onward have connected these developments to the Republic’s later social crisis. Their timing and extent remain debated, but the pressures began before the crisis became visible on the map.

The third war: a memorial, not a chapter. Carthage recovered commercially, and Cato repeatedly urged its destruction: “Carthage must be destroyed.” Roughly fifty years after the peace, Rome went to war again in 149 BC. The city fell in 146 after a three-year siege; its people were killed or enslaved and its site cursed. The ◆ marker records the destruction of a city that had revived in trade but was militarily weak.

DISCUSSION QUESTION

Rome suffered immense losses at Cannae and kept fighting. What allowed it to continue?

Rome could call on the large alliance described in the previous chapter. Polybius estimated more than 700,000 citizens and allies, a figure historians debate. Even losses that may have approached 100,000 over three years could be replaced, though the human cost was terrible. Annual magistracies supplied new commanders, and the Senate refused a settlement after Cannae. Southern communities defected, but many central allies remained connected to Rome by law, marriage and shared interests. Hannibal had destroyed armies without breaking the coalition that raised replacements.

AN INTERESTING FACT

Hannibal returned to public life after Zama. As suffete, or chief magistrate, elected in 196 BC, he reformed Carthage’s finances and challenged embezzlement by oligarchs. Ancient accounts connect the reforms with the city’s ability to meet its fifty-year indemnity. Within five years Carthage offered early payment; Rome refused. Hannibal went into exile and took poison in Bithynia around 183 BC rather than be handed over to Rome. Livy placed the death of his opponent Scipio Africanus in the same year, after Scipio’s withdrawal into self-imposed exile from Roman politics. Ancient historians noticed the symmetry.

CHAPTER 3 · 200–129 BC · 146 BC

The Greek East Falls

The Greek states that sought Roman help against Macedon had a practical reason for doing so: a powerful ally could protect them from a stronger neighbor. Rome, for its part, could present itself as their protector. But protection created relationships that lasted after an army went home. Clients brought further disputes to Rome, and each intervention strengthened its authority to decide what should happen next.

Rome’s armies could enforce those decisions. At Cynoscephalae and Pydna, they faced Macedonian phalanxes, dense formations whose long pikes were formidable while the line held. Roman legions fought in smaller units with their own leaders. Where uneven ground or casualties opened the Macedonian line, Roman soldiers could enter the gaps and attack a formation that depended on staying together. After Pydna in 168 BC, Rome divided Macedon and took a thousand leading Greeks to Italy as hostages. One was the historian Polybius.

The map changed more slowly than the balance of power. Even without annexing a territory, Rome could influence its rulers through treaties and hostages, backed by the possibility of another intervention. After Pydna removed a major counterweight, an envoy’s demand carried the force of the armies behind it. Provinces came later, when indirect arrangements failed or the prospect of direct revenue became attractive.

In 146 BC Rome showed what defiance could cost. After a long siege it destroyed Carthage; it also burned Corinth. Their inhabitants were killed or enslaved, and other cities were meant to draw a lesson from their fate. The atlas marks these destructions as memorials rather than triumphs. A different route to control opened in 133 BC, when the last king of Pergamon left his kingdom to Rome. Rome made it the province of Asia.

The eastern empire brought tribute, tax contracts, plundered art and enslaved people west. Greek learning enriched the culture of Rome’s elite. Yet the profits were concentrated, and slave-worked estates undercut small farmers in Italy. Rome had gained power over other societies; the means by which it exercised that power were also changing its own.

WHY IT HAPPENED

A power vacuum with an invitation. The eastern balance had depended on three great Hellenistic monarchies checking one another. By 200 BC Egypt had a child king, and Macedon and Syria were dividing its possessions. Smaller powers had reason to look for help: Pergamon, Rhodes and Athens appealed to Rome. They wanted an ally against their neighbors, and their invitations gave Rome a place in eastern disputes.

The phalanx meets the maniple. The phalanx depended on a wall of pikes held together across its front. On level ground it was formidable; where terrain or casualties opened a gap, separately led Roman units could get through. This difference mattered at Cynoscephalae and Pydna. Roman sources claim 20,000 phalangites died at Pydna against about 100 Romans. Those figures need caution, though the formations help explain the victories.

Fear, honor, and the Hannibal reflex. Hannibal’s invasion gave Romans a reason to fear what a powerful enemy might do if left unchecked. Antiochus sheltered the exiled Carthaginian, making that danger easier to imagine. Historians disagree about whether such fears directed Roman policy or supplied glory-seeking aristocrats with a convenient justification. Both interpretations must account for the same eastern wars.

Plunder as fiscal policy. Victory brought money as well as security and prestige. In 167 Aemilius Paullus returned with enough wealth for Rome to abolish direct taxation of its citizens for the long term. Commanders could gain glory and the treasury could gain revenue; these rewards gave influential Romans an interest in further conquest.

WHAT IT CHANGED

A slave society hardens. The scale of enslavement was immense: 150,000 Epirotes were enslaved in a single day in 167, and whole cities were sold after 146. Enslaved labor fed the growth of Italian estates called latifundia, while dispossessed free people moved to Rome. Enslaved people resisted in two Sicilian servile wars and later in Spartacus’s revolt. These changes helped form the Republic’s approaching crisis.

Asia: the province that corrupts. The kingdom left to Rome became the province of Asia. Private tax syndicates, the publicani, bid for the right to collect its revenues. Their extraction enriched the equestrian class while impoverishing people in Anatolia, and provincial misgovernment became an issue in Roman politics. Resentment of tax farmers later helped Mithridates, whose campaign brought the killing of 80,000 Italians in a single day.

Greek culture conquers its conqueror. The flow from Greece to Rome included ideas as well as wealth. Greek became a second language for the Roman elite, and Greek philosophy, historiography, medicine, art and urbanism entered Roman high culture. They traveled onward with Roman roads and law. The eastern empire that endured beyond this atlas was Greek-speaking and rich in cities; the ties formed here helped shape that later world.

DISCUSSION QUESTION

Did Rome intend to build a Mediterranean empire, or did its empire grow from successive interventions? What evidence would help distinguish the two?

Those who favor “defensive imperialism” point to roughly fifty years in which Rome annexed little. It fought, imposed settlements and withdrew, governing through clients; Macedon became a province only after four wars. Harris and other advocates of the aggression school instead stress the rewards available to annual consuls, soldiers and the treasury, and the gains that followed Rome’s repeated claims of danger. The events of 146 BC test the explanations. Neither Corinth nor disarmed Carthage posed an immediate threat, yet Rome destroyed both as examples. That does not establish that Rome had planned its whole empire in advance. It does show why intention and institutions must be considered separately: even without a blueprint, careers, the army and the treasury rewarded expansion. The distinction can also be applied to other powers’ claims of “reluctant” growth.

AN INTERESTING FACT

The destruction of Carthage in 146 BC gave rise to a persistent story: Rome supposedly sowed the soil with salt. No ancient source records it. The story entered textbooks in the nineteenth and twentieth centuries, and a historian traced it in 1986. Rome did curse the site, yet about a century later it founded a colony there. The new Carthage became one of the empire’s greatest cities; its loss in AD 439 would damage the western empire, as Chapter 11 shows. The destruction was real; the salt was a later invention.

CHAPTER 4 · 133–60 BC · 62 BC

The Republic Breaks

Rome’s small farmers had supplied soldiers for its armies. The demands of conquest placed that arrangement under pressure: long service overseas could damage a farm, while wealthy Romans acquired estates worked by enslaved people. The gains of empire accumulated unevenly, and the Republic had to decide what should become of citizens who had lost their footing.

Tiberius Gracchus offered an answer in 133 BC. He proposed taking public land illegally occupied by wealthy holders and distributing it to poorer citizens. Senators and their supporters killed him and hundreds of his followers. In 121 BC his brother Gaius and thousands more died. The land question remained, but political opponents had now used lethal force against reformers and their supporters.

Military recruitment brought another answer to the problem of manpower. Marius recruited the poorest citizens. For a man with no farm to return to, the prospect of land after discharge mattered greatly. A commander who pressed the Senate for a settlement could therefore be important to his soldiers long after a campaign ended. Their interest in his success gave an ambitious general political resources as well as an army.

Rome’s Italian allies also had claims on the Republic. They had served Rome and sought citizenship, but fought the Social War of 91–88 BC to secure it. Rome ended the war partly by granting their demand. The settlement answered a grievance, while showing that organized force could help win what political pressure had failed to obtain.

In 88 BC a popular assembly transferred the lucrative command against Mithridates, king of Pontus, from Sulla to Marius. Sulla answered by marching his legions on Rome. Civil war followed. His later proscriptions named citizens who could be killed and whose estates could be confiscated; ancient estimates of the dead range from about 1,500 to 9,000. The revolt led by the enslaved gladiator Spartacus was also crushed, with 6,000 captives crucified along the road from Capua to Rome.

The empire supplied exceptional commands, tax contracts and plunder to ambitious Romans. By 62 BC Pompey had reorganized the eastern provinces under his personal authority, an achievement that showed the scale of power one commander could exercise. Elections and laws continued, but a decision made through republican procedures was harder to enforce against a general whose soldiers depended on his promises.

WHY IT HAPPENED

Victory’s losers: the smallholder crisis. The citizen who provided his own arms and served in a legion had often been a farmer. Long campaigns overseas put his farm under pressure, while conquest supplied enslaved labor for the estates of wealthy landholders. Land reform promised to address poverty and protect a recruiting base, but it also threatened established holders. The resistance the Gracchi faced became violent.

The Marian reform: THE structural cause. From 107 BC Marius recruited poorer citizens to meet the army’s needs. A veteran seeking land could depend on his commander to obtain it from the Senate, and support from veterans could give that commander political leverage. Sulla, Pompey, Caesar and Octavian each used the relationship differently. In Chapter 6, Augustus establishes a state military treasury as a more permanent way to fund veterans.

Empire’s profits, concentrated; empire’s costs, socialized. Empire produced great wealth through provincial extortion, tax farming and slave-worked estates. The original account describes its concentration in a few hundred families, even as the urban poor multiplied. Politicians could seek support with grain and games or mobilize people in need. Institutions formed for a city-state of farmers now had to govern an empire whose rewards and burdens were distributed very unevenly.

No monopoly on violence. A law needs people willing and able to enforce it. Rome had no police force or standing army in Italy that could independently enforce a political settlement, and little organized force stood between a magistrate’s bodyguard and a legion. After the killings of 133 BC, factions used street violence; Sulla later brought legions to the city. The Republic could reach decisions, but powerful opponents could challenge them by force.

WHAT IT CHANGED

The east acquires an architecture. Between 66 and 62 BC Pompey reorganized the east: Syria was annexed, Judea and Armenia became clients, cities were founded, and Mithridates was dead. The map shows coastal provinces in red, a grey-tan buffer of client kings, and Parthia in blue beyond the Euphrates. The settlement organized a vast region under one commander’s personal authority, revealing how much power the Republic had entrusted to him.

The First Triumvirate. In 60 BC three men joined their interests in a private alliance. Pompey had military glory and veterans whose settlement he sought; Crassus brought wealth; Caesar sought advancement and carried debts. Caesar obtained a five-year command in Gaul. Together they could shape decisions through and around republican offices, although their cooperation would not last.

Violence ratchets, never resets. The Gracchan killings, Sulla’s proscriptions and the gangs active in elections in the 50s each left examples for later rivals. A faction considering restraint could fear that an armed opponent would take advantage of it. Political scientists describe such a problem as a broken equilibrium; Romans could see the anger of the gods at work. In either interpretation, a settlement that all sides would obey had become harder to restore.

DISCUSSION QUESTION

How did changes in recruitment help weaken the Republic, and how much weight should we give them compared with individual ambition?

Begin with what soldiers expected after service. Before 107 BC armies drew heavily on men with property who could return to their farms. Poorer recruits seeking land could instead depend on their commander’s ability to persuade the Senate. That gave soldiers a stake in his political success, and gave him supporters when he challenged rivals. Sulla’s march, Pompey’s threats, Caesar’s crossing and Octavian’s career show different uses of military power in this setting. The structural argument explains why several ambitious men found similar opportunities. Yet the land crisis and the killing of the Gracchi came before Marius, and historians dispute how much he changed recruitment. His measures could be a response to an existing crisis and a cause of further trouble. The structure made particular choices possible; the individuals who made them still mattered.

AN INTERESTING FACT

Ancient writers say Mithridates feared being poisoned by Rome and took small doses of toxins for years. His name survives in “mithridatism,” the idea of acquiring immunity in this way. Their account gives the practice a bitter ending: cornered by rebellion in 63 BC, he took poison, found it ineffective and asked a bodyguard to kill him with a sword. Pliny says Pompey found an antidote recipe in the king’s own handwriting among the spoils. European pharmacies continued to prepare “mithridatium,” attributed to that tradition, into the eighteenth century.

CHAPTER 5 · 58–44 BC · 52 BC

Caesar

In 58 BC Caesar needed a success large enough to answer his debts and match the prestige Pompey had won in the east. His governorship in Gaul gave him the means to seek it. The peoples of Gaul were divided by their own quarrels, and he could enter a dispute as an ally, then present further campaigns as defense or prevention. Much of the conquest was a war of choice. His Commentaries, written in a plain and persuasive style for Roman readers, gave his own account of those choices.

The people who paid for those victories were not confined to Caesar’s armies. Ancient writers put the number of Gauls killed at roughly a million and those enslaved at another million. Modern historians doubt the precision of those totals, while accepting that violence and displacement were vast; some describe particular episodes as genocide. Only in 52 BC did Vercingetorix bring a wider resistance together. At Alesia, Caesar surrounded the town and starved it, while a second ring of siege works faced an army coming to its relief. He defeated both forces.

Victory left Caesar with a problem of his own. His soldiers looked to him for their future, while enemies in Rome intended to prosecute him as soon as he became a private citizen. The Senate demanded that he surrender his command; keeping the army against that demand was illegal, but giving it up threatened his standing. Negotiated alternatives still existed. Caesar chose war, crossing the Rubicon with one legion on 10 January 49 BC.

The opposing commanders had resources spread across the Roman world. Pompey could call on the eastern settlement he had built, with provinces supplying taxes, grain, fleets and recruits. Caesar moved first through Italy and Spain, then crossed to Greece. His speed kept his opponents from bringing their advantages together. At Pharsalus in 48 BC his veterans defeated Pompey’s larger army.

Caesar eventually became dictator for life. He pardoned many opponents, reducing immediate resistance, and acted quickly on the calendar, colonies and extensions of citizenship. These measures showed administrative skill, but his pardoned rivals still had to live under permanent one-man rule. How could such power be limited or lawfully passed on? On 15 March 44 BC senators led by Brutus and Cassius killed him without providing an answer. The armies, debts and violent rivalries that had made his position possible survived him.

WHY IT HAPPENED

A war chosen as a career move. Pompey’s eastern victories had set a high standard for Roman prestige, and Caesar had colossal debts. A five-year command in nearby Gaul offered money, veterans and fame together. The migration of the Helvetii gave him an occasion to act; Cicero privately questioned whether it posed the danger claimed. The rewards available to a successful commander made expansion attractive.

Gaul’s division was Caesar’s best weapon. Some sixty peoples made up Gaul, and many had longstanding feuds. Caesar could support one against another, so that for much of the war only part of the opposition faced him at a time. In 52 BC Vercingetorix brought a wider coalition together, including Arverni and Aedui. That was a considerable achievement, seven years into the war.

The trap set in 88. In 88 BC Sulla had shown that an armed commander could march on Rome. Caesar invoked his dignitas, or standing, against enemies who could use the law against him once he disarmed. When a successful commander could not safely return to private life, the struggle over his next office became dangerous for the Republic itself.

Pompey’s fatal respectability. Pompey possessed formidable resources: the eastern provinces, naval strength and support in Italy. He left Italy to assemble a stronger force with the senatorial coalition, invoking Sulla’s example. Those resources had to be gathered before they could be used together. The delay gave Caesar the initiative and time to move into Spain.

WHAT IT CHANGED

Gaul: a province that changes the empire’s shape. After eight years of conquest, Gaul became part of a Roman world that lasted there for roughly four centuries. Lyon served as an administrative hub; Roman cities, villas and Latin culture shaped the province, and Latin became an ancestor of French. The frontier lay at the Rhine rather than the Alps, with Germania Magna beyond it. Chapter 6 follows Rome’s efforts to establish that boundary.

The dictatorship shows its face too soon. The calendar, colonies, debt and citizenship for Cisalpine Gaul were problems on which Caesar could act rapidly. His dictatorship also made the difficulty of concentrated power visible: force and favor supported his position, his safety depended on that power, and no succession was established. His eighteen-year-old heir Octavian would later keep decisive authority while carefully presenting republican forms.

The assassins prove the assassination pointless. Removing Caesar did not remove the conditions that had enabled his rule. Within twenty months new proscriptions claimed Cicero, and his head was displayed on the speaker’s platform. Another civil war followed within three years, and a new monarch within seventeen. From 44 to 31 BC Rome continued to live with the consequences of the Republic’s breakdown.

DISCUSSION QUESTION

Was Caesar’s Gallic War aggressive, and how did Romans judge it?

Caesar described his campaigns as defense of allies or prevention of danger, but intervention also opened the way to further conquest. Roman judgments differed. Cato reportedly urged the Senate to surrender Caesar to the Germans for killing the Usipetes and Tencteri during a truce, applying Roman standards to his conduct. The Senate also voted extraordinary thanksgivings, and the assemblies welcomed his victories. Glory and plunder won support despite objections. The expansion of Roman power and the immense suffering it caused are both part of the war’s history.

AN INTERESTING FACT

The Roman calendar had drifted months out of season, partly because the priests who managed its adjustments could use them for political convenience. In 46 BC Caesar, advised by the Alexandrian astronomer Sosigenes, brought it back into alignment by making that year 445 days long. Romans called it the “year of confusion.” His replacement averaged 365¼ days a year; the Gregorian reform of 1582 corrected an error of about eleven minutes annually. July, Caesar’s birth month, was named for Julius Caesar in 44 BC.

CHAPTER 6 · 44 BC–AD 14 · 30 BC

Augustus

Caesar’s name gave Octavian a claim on loyalty, but it did not give him uncontested power. He needed allies and money as well as soldiers. He joined Antony against Caesar’s assassins, and fresh proscriptions supplied their armies with property taken from condemned men. Cicero was among those killed. At Philippi in 42 BC Octavian and Antony defeated Brutus and Cassius; the victors then divided the Roman world between them.

The alliance eventually became another contest for supremacy. Antony had tied his political and military future to Cleopatra’s Egypt, whose resources helped sustain his position. Octavian used that connection to tell Romans a different story about the coming war: Rome was fighting a foreign queen, rather than choosing between two Roman rivals. At Actium in 31 BC Agrippa’s fleet won. Egypt’s treasury, grain and taxes passed to Octavian, who now commanded every legion.

Command of the armies could win a civil war. Could it also support a lasting government? In 27 BC the Senate gave Octavian the name Augustus. Elections, courts and the Senate continued, and ambitious Romans still had public careers to pursue. Augustus nevertheless governed the frontier provinces containing nearly all the legions, held the powers of a tribune and outranked other magistrates. Republican institutions remained, while their most powerful offices and commands came together in one man.

He also changed what a soldier could expect from service. Terms, pay and pensions were regularized and funded through a state treasury. Soldiers had a permanent patron at the summit of the state, rather than competing generals upon whom they depended for rewards. That reduced a rivalry which had helped drive the civil wars.

The arrangement offered different groups reasons to accept it. Senators retained office and status; Italians gained relief from war and confiscation; provincial communities received steadier supervision; soldiers gained predictable rewards. The peace was real, and so was the concentration of authority that sustained it. Defeat in the Teutoburg Forest in AD 9 helped set limits to expansion along the Rhine and Danube.

In AD 14 Tiberius succeeded Augustus smoothly through family connection, adoption and control of the armies. A transfer had taken place, and personal rule had become an institution. But no fixed law had settled how the next ruler should be chosen. Rome had replaced rival military patrons with one supreme patron without resolving who would inherit that position.

WHY IT HAPPENED

War-weariness as a political resource. For two generations Italians had lived with proscriptions, land confiscations for veterans and wars in which kin killed kin. Against memories of the 40s BC, order under concentrated authority had an evident appeal. Augustus’ regime could survive scandals and defeats that might have ruined a politician in the Republic partly because people had experienced the alternative.

Cleopatra’s Egypt: the last independent treasury. The Nile’s grain surplus, royal monopolies and Alexandria’s trade made the Ptolemaic kingdom wealthy. Antony could draw on that treasury in his contest with Octavian. After taking Egypt, Octavian could pay some 300,000 demobilized soldiers without another confiscation of Italian land. The same resources that financed a rival helped the victor settle his army.

The propaganda war was the war. Octavian urged Italians and provincial elites to see his opponent as “the Egyptian queen.” Cleopatra’s foreignness and her relationship with Antony let him present himself as Rome’s champion instead of one Roman claimant among two. Antony had a larger fleet and a strong military reputation, yet allegiances weakened during the two years before Actium. The battle followed an extended struggle for support.

A monarchy the political class could pretend not to see. Caesar’s apparent kingship had alarmed his assassins. Augustus accumulated offices and honors with republican precedents, while senators continued to hold provinces, consulships and other positions. The political class could find a place for itself within those familiar forms. They helped sustain the Principate for roughly two centuries, even as they made its concentration of power difficult to discuss openly.

WHAT IT CHANGED

The Pax Romana opens. The Mediterranean interior enjoyed long stretches of peace between Actium and the death of Marcus Aurelius in AD 180. Romans expressed that peace in ceremonies, closing the doors of the temple of Janus that were traditionally open in wartime. A poet wrote that “the sea is safe,” capturing the security associated with the suppression of piracy. Chapter 7 examines the order that supported it.

The frontier becomes a philosophy. After the defeat in the Teutoburg Forest, expansion beyond the Rhine met a limit. Augustus advised keeping the empire within its bounds, although later rulers, notably Trajan, undertook further conquests. A limit was not the end of military work: frontiers had to be held and administered. Chapters 7 and 8 follow the resources and strains involved.

One office, no rules for filling it. Augustus established no settled law for choosing an emperor. Adoption, family inheritance and the army’s acclamation could each help a claimant, but they could also favor different people. In AD 69 four emperors followed one another; succession disputes also marked 193 and the crises of the third century. Authority under one ruler had reduced rivalry among generals, yet the choice of the next ruler could revive it.

DISCUSSION QUESTION

Augustus claimed, on his own monument, to have “transferred the Republic back to the Senate and People of Rome.” Was the Principate a lie — and did its being a lie matter?

Augustus could point to real republican institutions: offices, elections and courts continued. His powers also had precedents, including Pompey’s exceptional commands and the sacrosanct authority of tribunes. What changed was their continuous combination in one person, giving Augustus’ wishes decisive weight in practice. The forms mattered because they gave elites a place in the settlement, helped prevent a Hellenistic-style court from forming for a century and preserved an ideal of lawful, accountable rule that could be invoked against emperors. They also made it difficult to define openly the ruler’s limits, the army’s political role and succession. Both the settlement’s long stability and the crises left to later generations belong in its assessment.

AN INTERESTING FACT

The location of the Teutoburg disaster remained uncertain for centuries. In 1987 Tony Clunn, a British Army major serving in Germany, began finding Augustan silver near Kalkriese with a metal detector. Excavators later found sling bullets, mule remains, pits of weathered human bone and an iron cavalry parade mask with its silver covering torn away. No coin found at the site postdates AD 9. Most scholars, though not all, accept Kalkriese as the place where Varus’ legions met disaster.

CHAPTER 7 · AD 14–180 · AD 117

The Pax Romana

By AD 117, Trajan’s empire reached from the Atlantic into Mesopotamia, and his armies had briefly reached the Persian Gulf. Its size was the result of very different campaigns. Claudius had invaded Britannia in AD 43; Trajan took Dacia in two difficult wars between 101 and 106, securing its gold and helping establish the Latin from which Romanian would develop. His eastern conquests were less lasting. After roughly two years Hadrian surrendered them.

The territory on the map, however, tells us little about how Rome governed it. Roughly 300,000 soldiers and a small senior civil service could not conduct the daily business of sixty to seventy million people from the capital. Instead, leading city families collected taxes, administered justice and paid for buildings. Office, prestige and citizenship gave them reasons to serve. Roads, safe sea lanes and common coinage linked their cities around mare nostrum, “our sea.” Local ambition thus helped maintain an imperial system.

That system rested on force as well as cooperation. The limes, or frontier, was a zone of patrols and customs controls, not an unbroken barrier. Rome also had to convince potential opponents that resistance would be costly. The Judaean revolt ended with the destruction of Jerusalem and its Temple in AD 70; the Bar Kokhba war of 132–135 killed, displaced or enslaved large numbers. These events belong on the map as memorials to the people who suffered, not as measures of imperial success.

Hadrian’s decision to limit expansion changed the demands on the empire. Hadrian’s Wall, begun in 122, channeled movement and supported patrols rather than sealing Britain with an impassable barrier. Earlier conquests had brought land, captives and prestige; holding territory now required steady tax revenue and local cooperation. Citizenship could reward provincial elites for their work, but Caracalla’s grant to nearly all free inhabitants in AD 212 made it less distinctive as a reward.

From about 165 the Antonine plague, probably smallpox, caused heavy mortality, though its scale is uncertain. Frontier pressure was increasing by Marcus Aurelius’s death in 180. Rome remained powerful for a long time, but its economical government had little central reserve. The same reliance on local resources that made the empire inexpensive to run also made a great shock harder to absorb.

WHY IT HAPPENED

Cities as the operating system. Rome’s senior officials relied on thousands of local arrangements. In chartered towns and existing communities, landowners helped administer courts and taxes in return for status, citizenship and careers. Their work reduced the need for a large central bureaucracy. The Greek east had a denser network of cities than parts of the west, a difference that helps explain its later resilience in Chapter 12.

The legions as engineers and settlers. The legions connected provinces as well as conquering them. Between campaigns soldiers surveyed land and built roads, bridges and aqueducts. Veterans’ colonies helped establish Latin-speaking towns from Spain to Syria, carrying the army’s influence into civilian settlement.

A frontier held by reputation. Thirty legions could not form an unbroken barrier along 8,000 kilometers of frontier. The limes instead monitored movement and customs, while the prospect of retaliation helped discourage attacks and resistance. Sarmizegetusa and Jerusalem demonstrated Rome’s capacity to punish. This saved resources, but threats in several places at once could expose the limits of deterrence, as Chapter 8 shows.

Good luck wearing the costume of good government. The “Five Good Emperors” of 96–180 adopted successors, a sequence often praised as selection by merit. But each lacked a surviving son until Marcus Aurelius, who chose Commodus. Adoption provided rulers during this period; the circumstances do not establish a durable solution to succession. A fortunate run and a reliable institution are different things.

WHAT IT CHANGED

Romanization becomes self-sustaining. Roman culture took root beyond Italy. By 180 Gaul, Spain and Africa had produced senators and authors; Trajan and Hadrian came from Spain, and the later emperor Septimius Severus from Africa. Generations spoke Latin as a native language from the Atlantic to the Danube. These connections outlasted the western state: languages, law and church institutions endured after the fall described in Chapter 11, as Chapter 12 follows.

The 212 citizenship: completion and hollowing at once. Caracalla’s grant in 212 extended citizenship to nearly all free inhabitants. It carried much further Rome’s practice of incorporating conquered peoples, while making citizenship less distinctive as a reward for provincial elites. As frontier pressure increased, military careers gained importance and civic office could become less attractive because of its costs.

Plague enters the ledger. The Antonine plague spread from 165 to about 180 through armies and communities across the empire. Egyptian tax records show depleted villages, while recruitment and prices were disturbed for years. Its exact toll is uncertain. Historians including Kyle Harper, in “Fate of Rome,” have weighed disease alongside politics in Rome’s trajectory. The Mediterranean connections that moved grain also gave infection routes across the empire.

DISCUSSION QUESTION

Rome governed a quarter of humanity with fewer administrators than a modern mid-sized city. How — and what was the hidden price of governing so cheaply?

Rome relied on work performed locally. Cities managed their affairs, elites collected taxes in exchange for status and opportunity, and soldiers built infrastructure as well as guarding frontiers. Deterrence reduced the need to station troops everywhere. One estimate puts state overhead at 5–7% of GDP. The savings depended on institutions with little spare capacity. There was no standing central army behind the frontier, and a force assembled by a usurper could leave that frontier exposed. Revenue collection relied on city elites, while soldiers could give their loyalty to a claimant as well as an emperor. These arrangements worked for long periods, but several shocks together could strain them, as Chapter 8 shows.

AN INTERESTING FACT

The garrison at Vindolanda, near Hadrian’s Wall, left an unusually direct record of its life. Waterlogged, oxygen-poor soil preserved hundreds of thin wooden writing tablets, including strength reports and a note that the soldiers’ beer had run out. Around AD 100 Claudia Severa invited Sulpicia Lepidina, another officer’s wife, to a birthday party. Severa added the closing greeting in her own hand, among the earliest known examples of Latin handwriting by a woman. Another report calls local people Brittunculi — “wretched little Britons”.

CHAPTER 8 · 235–284 · AD 271

The Third-Century Crisis

Between 235 and 284 Rome had about twenty-six emperors. Soldiers raised commanders to power, and often killed them in turn. Each claimant had to defeat Roman rivals as well as defend the empire; troops drawn into those contests could not also guard the frontiers they left behind.

The enemies at those frontiers had ambitions of their own. Gothic groups crossed the Danube and raided deep into the Balkans. They killed the emperor Decius in battle in 251 and raided Athens in 267–268. In the east the Sasanid monarchy had replaced Parthian rule, giving Rome a Persian rival capable of taking fortified cities as well as raiding. Shapur I invaded Syria and sacked Antioch. At Edessa in 260 his forces captured Valerian alive; the emperor died in captivity, and Rome could mount no immediate reprisal. The lean system inherited from the second century had little spare capacity for civil war and emergencies on both frontiers.

Disease and money made the military problem harder. The Plague of Cyprian probably reduced the number of workers, taxpayers and recruits, although both the disease and its mortality remain uncertain. Emperors reduced the precious metal in coins to meet costs, especially the cost of soldiers. More coins could pay an army for the moment, but falling purchasing power damaged wages and revenue. The government increasingly sought what it needed directly in goods.

In these conditions provincial leaders organized defense closer to home. Postumus ruled a Gallic Empire from Trier. Palmyra first defended the east, then under Zenobia took Egypt and much of Anatolia. Regional commands kept resources near threatened provinces, but troops and taxes held there were unavailable to the recognized emperor. The arrangement answered a local need while deepening the division.

Those regimes did not join the Goths or Persia. They claimed Roman authority and used Roman institutions. Aurelian defeated them between 270 and 274, earning the title Restorer of the World; the survival of those institutions and Rome’s prestige helped make reunion possible. He also withdrew from Dacia beyond the Danube. Shortening the frontier released resources for defense, and the choice showed that holding territory had to be weighed against the cost of supplying it. Reunion restored the empire’s reach, but succession and the fiscal system still needed answers.

WHY IT HAPPENED

Armies and succession. Augustus’ monarchy lacked a consistently accepted procedure for transferring power. After 235 an army could acclaim its commander, and every emperor had reason to fear another army doing the same. Fighting a rival could require troops from the frontier; a defeat on the weakened frontier could then encourage another claimant. The contest for power and the danger from outside fed each other.

A new Persian rival. The Sasanid dynasty, established in 224, built a more centralized Persian monarchy than the Parthian state it replaced. Its rulers pressed claims associated with the old Achaemenid lands, including Rome’s east, and their armies could besiege and take cities. Rome faced a major power on the Euphrates just as the Danube also demanded serious attention.

Paying for war. Debasement gave an emperor more coins with which to pay soldiers and accession bonuses. The immediate payment did not settle the longer problem: rising prices reduced purchasing power and made taxation less reliable. Soldiers whose real pay fell could demand more, while city elites facing costly obligations had reason to evade them. The government increasingly took goods directly and used coercion, which itself required officials and force.

The Plague of Cyprian. During the 250s and 260s, the Plague of Cyprian struck cities while invasions and usurpations placed exceptional demands on the empire. Deaths among workers, taxpayers and potential recruits would have reduced the resources available to meet those demands. Its timing makes disease a serious part of the explanation, even though its scale and precise contribution remain debated.

WHAT IT CHANGED

Leaving Dacia. Aurelian withdrew garrisons and officials from Dacia beyond the Danube in 271–275. South of the river he established another province called Dacia: the name survived, but the frontier to supply and defend was shorter. The next snapshot shows the territory changing color. Latin-derived speech survived in Romania long after the legions left, a question about the endurance of Roman culture taken up in Chapter 12.

A changed army and currency. The crisis accelerated changes in command and organization. Soldier-emperors from the Danubian provinces rose at the expense of the Italian senatorial class, and mobile forces were used more extensively to respond to emergencies behind the frontier. Currency changed later too. Constantine’s gold solidus became a durable foundation of Mediterranean trade for some 700 years. Chapter 9 follows the reforms of the army and fiscal system.

A growing church. The church continued to grow amid war and plague. Bishops linked communities across the empire; Christians cared for poor people and buried their own dead and others. Persecution under Decius and Valerian produced martyrs and could strengthen solidarity. By 300 Christians may have made up a tenth of the empire, though estimates are uncertain. Diocletian later tried to suppress the church, while Constantine supported it. Both policies took account of an institution with an extensive network of its own.

DISCUSSION QUESTION

Which mattered most in the third-century crisis: military and political conflict, economic strain, or disease? What difference does your ranking make?

One case gives priority to military and constitutional conflict. The mutiny of 235 preceded the worst invasions, and rival armies drew soldiers away from frontiers that needed defense. An economic argument starts earlier: Marcus Aurelius had already used debasement to finance wars, and by the 260s unreliable pay and taxation threatened the means of defense. A biological argument points to plague’s timing and asks why a system that survived succession crises in 69 and 193 faced a deeper crisis after 250. Each argument must establish how much weight its factor deserves, not simply show that it mattered. The pressures can also be combined: plague and invasion strained resources, succession disputes turned armies against one another, and fiscal measures created further difficulties. The ranking changes where we look for a remedy—succession rules, sound finance or public health—but a convincing choice must still account for the other pressures.

AN INTERESTING FACT

The walls Aurelian built around Rome during the crisis served as working defenses for some 1,600 years. Popes repaired and re-crenellated them in the Middle Ages. On 20 September 1870 Italian artillery breached them at Porta Pia, ending papal rule in Rome, which became the capital of united Italy. Much of the roughly nineteen-kilometer circuit still stands, and Romans travel through its gates today.

CHAPTER 9 · 284–337 · AD 312

Diocletian and Constantine

The third-century crisis had exposed two connected problems. Armies needed emperors close enough to respond to danger, yet every army that raised its own candidate threatened to start another civil war. Diocletian’s Tetrarchy gave the empire four legitimate rulers stationed near frontiers: two senior emperors and two junior colleagues intended to succeed them. Government itself acquired a more imposing appearance. From Nicomedia in the Greek east, Diocletian presented the emperor as a sacred, half-divine figure, surrounded by ceremony. Augustus had posed as the first citizen; the new monarchy, often called the Dominate from the Latin for “lord and master,” made the ruler’s exalted position unmistakable.

Diocletian also changed the machinery beneath the throne. He roughly doubled the number of provinces to around a hundred, allowing closer supervision, and separated civilian governors from military commanders so that a governor had fewer forces with which to rebel. The army grew toward half a million men, with mobile troops held behind the frontier to reinforce threatened areas. Taxes assessed in goods and organized around an annual budget helped supply this force despite debased coinage. These arrangements brought roughly twenty years of stability and victories over Persia. They also left more soldiers and officials to be supported by a tax base that had not grown.

The succession plan faced its test in 305, when Diocletian voluntarily retired and required his senior colleague to do the same. It soon failed. Constantine, an emperor’s son passed over in the arrangement, was acclaimed by his late father’s army and went on to defeat his rivals. At the Milvian Bridge in 312 he won under a sign he later associated with Christianity. Christian worship was legalized in 313. Constantine funded churches and summoned the Council of Nicaea in 325; his motives probably combined sincere belief with political calculation.

In 330 Constantine dedicated Constantinople on the Bosporus. The choice made visible a change already under way: the richer, more urban east supplied revenues more readily than the west and lay close to the Danube and Persian fronts. Sea routes and strong defenses helped protect the new capital. Rome kept its symbolic standing, but the working center of government moved toward the resources and dangers that occupied its rulers. The heavier state had helped restore the empire; its eastern half would have a stronger foundation for sustaining it.

WHY IT HAPPENED

Answers to the third century. The repeated usurpations and failures of the third century shaped Diocletian’s choices. Four rulers addressed the struggle for a single throne; separate civil and military offices limited the power of governor-generals. Taxes in goods answered debased coinage, while sacred ceremony raised the dignity of an office whose holders had so often been killed. These measures were designed for dangers already experienced. Barbarian settlement and the west’s thinner economy would present further tests.

Persecution and the church. From 303 to 311 the Great Persecution sought to break Christianity. Authorities burned scriptures, imprisoned clergy and required Christians to sacrifice. Yet Christians were connected across communities, held official posts and included people willing to die for their faith. The campaign failed; an eastern edict ended persecution in 311. Constantine’s support, a decade after the campaign began, brought the emperor into partnership with a network the state had been unable to destroy.

An eastern centre. Constantinople did not create the east’s importance. Diocletian had governed from Nicomedia and visited Rome only once: cities, revenues, recruits and dangerous frontiers had already drawn the court eastward. Constantine gave that orientation a new capital. When eastern and western courts were formally separated in 395, the east had a defensible capital and resources to garrison it; the west retained Rome’s prestige and its exposure. Chapter 11 follows their unequal fortunes.

An organised Christian community. Roman traditional religion joined many local cults to civic life. Christianity connected communities differently. Bishops in cities, councils, letters and charitable work gave the church an infrastructure that crossed social and ethnic divisions. Its universal membership and account of authority under one God also offered a way to relate religious and imperial power. Constantine gained organized partners, and their disputes came with them. Chapter 12 follows the church beyond the western state it joined.

WHAT IT CHANGED

The cost of government. A larger government had to be paid for. Courts, officials and soldiers depended on taxes and compulsory obligations, including those placed on guilds and tenant farmers, or coloni, tied to estates. A contemporary pamphleteer complained of “more tax-eaters than taxpayers,” Diocletian’s Price Edict of 301 attempted to control inflation by fixing prices, but a prescribed price could not ensure that goods would be offered at it. Did the heavier state preserve the empire or damage the economy and loyalty it needed? Chapter 11 returns to the question in the west.

Church and imperial power. By sponsoring the church, emperors became involved in its disputes: Constantine called bishops to Nicaea to address one of them. Church leaders could also challenge imperial conduct. Within eighty years Bishop Ambrose required Theodosius to perform public penance after Thessalonica. The alliance made cooperation possible, while giving religious and political authorities reasons to contest one another. Chapter 12 considers that relationship’s longer history.

An eastern capital. Constantinople acquired its own court, senate, mint and grain supply, including grain redirected from Egypt. The eastern government could therefore operate from a center less dependent on Rome. Compare its foundation in 330 for a united empire with the formal division in 395 and the end of the western imperial line in 476. The eastern empire survived until 1453. The capital was only part of that difference, but its defensible position and resources helped the eastern court govern and defend itself.

DISCUSSION QUESTION

Did the larger state created under Diocletian and Constantine weaken the empire it helped preserve?

The reformed state could defend the empire: after 284 its frontiers held for a century, Persia was repeatedly defeated, and the east retained the apparatus for centuries longer. Those results give the case for paying for a larger government its force. The costs matter too. Sources describe tax flight, local elites trying to escape council duties and burdens on farmers. Salvian later reported people preferring barbarian rulers to Roman exactions; his complaint cannot establish what every taxpayer thought. The east’s greater wealth made the demands easier to sustain there than in the west. We must weigh the protection against its cost, and ask whether a lighter government could have provided comparable defense.

AN INTERESTING FACT

Diocletian’s fortified retirement palace on the Dalmatian coast became part of a living city. In the seventh century refugees from nearby Salona settled within its walls, helping to form Split, Croatia. Roughly 3,000 people still live in the palace complex, with laundry hanging between imperial columns. His mausoleum became Split’s cathedral, dedicated to a bishop martyred during his persecution of Christians. The emperor’s body vanished from history.

CHAPTER 10 · 376–410 · AD 396

The Storm from the North

The Huns, mounted nomads advancing west from the steppe, shattered the Gothic world north of the Danube. In 376 perhaps a hundred thousand Goths came to the river seeking admission to the empire. Valens saw an opportunity: settlers could become taxpayers and soldiers. Feeding and settling such a large group was difficult, but Roman officials made the task worse. They diverted provisions and exploited the people left hungry. The Goths revolted.

Valens faced them at Adrianople on 9 August 378 without waiting for the western army. The Goths destroyed roughly two-thirds of his field force and killed him. A contemporary compared the defeat to Cannae. There was a difference: the Republic after Cannae had Italian allies from whom it could draw replacements, while the late empire lacked a comparable reservoir. The loss of trained troops therefore shaped the terms on which the war could end.

In 382 Theodosius settled Goths within the empire as foederati, allied soldiers serving under their own leaders. The arrangement supplied men the state urgently needed. Earlier settlers had often been dispersed and absorbed into provincial administration; now service depended on maintaining an agreement with an armed community. A change of ruler or a failure to meet obligations could bring the bargain into question again. Another kind of authority appeared at Thessalonica in 390. After Theodosius ordered the massacre of thousands following a riot, Bishop Ambrose required the emperor to perform public penance. The church had visibly brought an emperor to account.

The need to defend frontiers competed with another danger. An emperor who ignored a Roman rival might lose his throne, so civil wars repeatedly drew troops away from the borders. Peoples crossed the weakened Rhine at the end of 406. Meanwhile Alaric sought grain, land and pay for his followers and a recognized command for himself. The western court negotiated and resisted. In 408 it executed Stilicho, an experienced intermediary, and attacked federate families; more soldiers joined Alaric. His forces sacked Rome for three days in 410. The physical damage was smaller than later memory suggested, but the shock was immense. The road to the city had passed through decisions about settlement, military resources and imperial power.

WHY IT HAPPENED

The Huns and Roman choices. Peter Heather gives the Huns a central place in the explanation. Their advance compressed peoples against Roman frontiers within a generation, linking the pressures behind the crossings of 376 and 406 with Attila’s campaigns in Chapter 11. Other historians emphasize the empire’s internal condition: earlier governments had dealt with Cimbri, Marcomanni and Goths. These questions belong together. Rome did not create the pressure from the steppe, but its institutions and decisions helped determine the outcome when people reached its borders.

The cost of Adrianople. The force lost at Adrianople had served as the eastern empire’s strategic reserve. The Republic could replace losses after Cannae from a citizen-militia base and its Italian allies; the late empire needed money and recruits to rebuild its army. The 382 treaty supplied Gothic soldiers in response to that shortage. Later losses of taxable land could make replacement still harder: less revenue meant fewer resources for troops, and concessions to armed groups could in turn reduce the revenue available. Chapter 11 follows this fiscal argument. The treaty answered a real need, even though later outcomes were not inevitable.

Civil wars and frontiers. Theodosius marched the eastern army west against Roman usurpers in 388 and 394, drawing resources away from the Rhine and Danube. A rival could take an emperor’s throne, so the danger was immediate. The provinces bore part of the cost when frontier forces were weakened. Peoples crossed the Rhine in 406 after withdrawals; Stilicho’s defense of Italy also drew troops from Britain and Gaul, where Constantine III emerged as a usurper. Protecting a ruler against Roman competitors could leave the empire less able to defend its borders.

The problem of integration. Rome had brought Gauls, Spaniards and Illyrians into its political and military life over centuries. Could it have accommodated the Goths in a comparable way? Alaric’s long pursuit of office suggests an opportunity, although any agreement would have needed both parties to sustain it. Hostile factions at court and religious differences—the Goths were Arian Christians—made accommodation harder. Attacks on federate families in 408 pushed soldiers toward Alaric, making the problem more urgent.

WHAT IT CHANGED

The exposed West. The division of 395 left the east with Constantinople’s fortified approaches and a larger share of imperial revenues—roughly two-thirds by one estimate. The west had the long Rhine and upper Danube frontiers, Britain, and the vital grain and taxes of Africa. Losses in 406, 410 and 439 therefore fell on the government with less capacity to replace them. The loss of Africa in 439 made the disparity especially consequential. Chapter 11 follows the western balance sheet.

The meaning of 410. The court was safe in Ravenna when Rome was sacked. Alaric died within months and his Goths later moved toward Gaul, but the event’s meaning outlasted its immediate damage. Pagans blamed the abandonment of the old gods. Augustine answered that no earthly city was the City of God: the fate of a political order was distinct from Christians’ ultimate hopes. That distinction helped shape Latin Christian thinking about politics for centuries.

Britain after imperial rule. Around 410 imperial government withdrew from Britain without an immediately succeeding single conquering government. Towns, villas, coinage and literacy contracted especially severely as the institutions supporting them disappeared. Bryan Ward-Perkins draws on pottery and coin distribution to examine the material consequences. Britain gives Chapter 12 a case in which to ask what the words “fall” and “transformation” explain.

DISCUSSION QUESTION

How did Goths seeking admission in 376 come to sack Rome in 410? Which decisions offered opportunities to change that course?

The crossing offered Rome prospective settlers and soldiers. It was the diversion of food by officials that helped turn settlement into revolt. Valens then attacked at Adrianople without waiting for the western army, and defeat limited the choices open to his successors. The 382 treaty supplied needed soldiers while recognizing Gothic forces under their own leaders. Later, land and a command for Alaric might have provided another accommodation within the empire. The execution of Stilicho and attacks on federate families in 408 strengthened Alaric instead. The years before 408 were a possible last opportunity for a negotiated settlement, though its success cannot be known. Each choice altered the circumstances in which the next had to be made.

AN INTERESTING FACT

Galla Placidia, the emperor’s half-sister, was among the hostages taken away by the Goths. At Narbonne in 414 she married their king Athaulf in Roman dress, while a deposed Roman emperor sang the wedding hymn. A contemporary reports that Athaulf had come to favor restoring the Roman name with Gothic arms. After his death she returned in exchange for 600,000 measures of grain, married a Roman general and became Augusta. She later governed the western empire for roughly a dozen years as regent for her son, its emperor.

CHAPTER 11 · 410–476 · AD 451

The Fall of the West

The Western empire needed Africa to pay for its defense. By the time Geiseric led perhaps eighty thousand Vandals and their families across the strait of Gibraltar in 429, war and the loss of control had disrupted revenue from Britain, Spain and Gaul. Africa, by contrast, remained prosperous and comparatively secure. It supplied grain to Rome and may have furnished two-fifths of the revenue still available to the western government, much as Egypt supported the East. Geiseric moved along the coast and took Carthage without a siege on 19 October 439. The government now had to find the money to recover a province whose taxes it had just lost.

Both imperial governments understood what was at stake. Expeditions in 441 and 460 failed, and in 468 East and West sent a great armada against Geiseric. It is said to have numbered some eleven hundred ships and cost roughly a year of eastern revenue. Off Cape Bon, Vandal fire-ships destroyed it. The scale of that failure left no affordable comparable attempt to restore the African tax base.

Military success elsewhere could not repair that loss. In 451 Aetius led Roman and federate forces alongside Visigothic allies against Attila at the Catalaunian Fields, where they checked the Huns. Yet court politics then deprived the West of its commander: Valentinian III had Aetius murdered in 454 and was himself murdered in 455. As central authority contracted toward Italy, the government had fewer resources and fewer capable leaders with which to hold its mixed armies together.

Odoacer deposed the child emperor Romulus Augustulus in 476 and sent the imperial insignia to Constantinople. There was no great final battle. The new kings retained Roman officials, bishops and law because they remained useful instruments of government. Much of Roman society continued, but the western office that had coordinated armies and collected taxes had ended. Land grants to federate soldiers had helped meet immediate obligations when cash was short, while removing property from future taxation. The failure to recover Africa had left the government with no obvious way to rebuild that revenue.

WHY IT HAPPENED

Africa and the army. The western army depended on the combined revenues of Africa, Gaul, Spain and Italy. One estimate puts the cost of a late Roman soldier at roughly the taxes of five peasant households. Britain was lost in 410; Sueves and Vandals entered Spain after 409, with much of it lost by the 420s; Aquitaine was ceded to the Visigoths in 418; and northern Gaul became autonomous. Africa fell in 439. Revenue may then have been halved, although the threats remained. Grants of land to federates answered an immediate need for payment at the cost of reducing the taxable base again.

Federate soldiers and their patrons. Western armies in the 450s brought Gothic, Hunnic, Burgundian and other forces together under Roman patrons. Their coalition could be effective, as the Catalaunian Fields showed, but its members expected support and rewards. In 476 soldiers sought land in place of pay, and Odoacer removed a government unable to satisfy them. The relationship recalls the client armies of Chapter 4: the ties that helped commanders assemble forces also gave soldiers’ demands political force.

The eastern choice. The East had its own defense to finance. Constantinople paid gold to Attila, potentially buying relief more cheaply than war, and fortified the Theodosian Walls. Yet the joint expedition of 468 shows that it also committed vast resources to recovering Africa. After the fleet was destroyed at Cape Bon, it mounted no comparable attempt. The surviving eastern tax base and administration later supported Justinian’s brief reconquests of Africa and Italy, as well as the preservation of Roman law. The division marked in 395 had become a division between a surviving eastern core and a West the East could no longer restore at that cost.

Loyalty and protection. Odoacer met no popular rising or senatorial resistance in 476, and no province is recorded begging for reunion. Different groups had reasons to accept a new ruler. Aristocrats could retain estates and serve kings who governed through Roman law, officials and the church. Salvian reported around 440 that some poor Romans went to the Goths to escape Roman tax collectors. He wrote as a moral critic, not a pollster; still, his account raises a question about loyalty to a government that continued to demand taxes after it had ceased to protect its subjects.

WHAT IT CHANGED

Successor kingdoms. The western provinces became kingdoms governed by Visigoths in Spain, Franks in Gaul, Vandals in Africa and Ostrogoths in Italy. These military elites ruled Roman populations and relied on established landowners, bishops and Latin law. Their kingdoms followed different courses, but the settlements of 418–511 helped shape later western Europe; the Frankish kingdom contributed to the formation of France. The end of western imperial government opened the histories of these successor states.

Bishops and cities. Bishops possessed literacy, resources and networks organized through Roman dioceses. As imperial administration weakened, cities could look to them for food, ransom, justice and records. The bishop of Rome already claimed primacy, and no western emperor now resided in the city. The medieval papacy developed over a longer period, but the church acquired responsibilities as well as influence in the changing order. Chapter 12 follows that development.

Roman rule in the East. In 476 Constantinople retained an emperor, Roman administration and law, Greek learning and an economy using the gold solidus. Justinian’s codification in 529–534 became an important ancestor of later civil-law systems. The imperial line continued until 1204, and a Roman empire endured in the East for centuries after 476. Its people understood themselves as Romans, even as Greek became central to their political culture. The final map shows where imperial Rome continued.

DISCUSSION QUESTION

Why did the East survive when the West fell? Consider geography, wealth and contingency, and what they imply about the West’s chances.

Many historians rank geography first. Constantinople was protected by the Bosporus and the Theodosian Walls, and Anatolia, Syria and Egypt supplied a comparatively sheltered tax base. Western wealth in Africa, Italy and southern Gaul lay behind long, exposed frontiers. Wealth comes next, although the two were connected: the richer, more urbanized and monetized East could pay Attila, maintain armies and recover from defeats such as Cape Bon. The West never recovered Africa’s revenue. Contingency mattered as well: Geiseric took Africa, eastern diplomacy directed Theodoric toward Italy in 488, and eastern emperors were not children during the worst decades. On this ranking, holding or recovering Africa was a major western chance. The expeditions of 441–468 show that rulers saw its importance, though recovering it would not have resolved every political difficulty.

AN INTERESTING FACT

Romulus Augustulus, deposed in 476, bore the name of Rome’s founder and a diminutive of its first emperor: Augustulus means “little Augustus.” He received a pension of 6,000 solidi a year and lived at Lucullus’s former villa on the Bay of Naples. Around 507–511 Cassiodorus recorded a grant to a “Romulus”; if this was the former emperor, he may have survived his empire by thirty years. Constantinople had never recognized him as emperor. Its recognized western emperor, Julius Nepos, remained in Dalmatia until his murder in 480.

EPILOGUE · 476 AND AFTER · AD 481

Why Rome Fell — and What Survived

For more than two centuries scholars have disputed why Rome fell. One counted over two hundred explanations, including moral decay, lead poisoning and climate change. The number matters because it forces us to ask what each explanation is meant to explain. The western imperial government disappeared; Roman institutions also endured; and evidence from the provinces shows severe material losses. These are connected events, but they are not identical.

Peter Heather and Chris Wickham are associated with a fiscal-military explanation: armies depended on taxes, while taxpayers depended on armies for protection. The movement of the Huns helped drive armed peoples across the frontier. When Africa was lost in 439, the western state lost revenue it needed to maintain forces and recover territory. Further losses could then weaken the army still more.

Peter Brown’s account of transformation draws attention to continuities. Roman elites became bishops, kings took the place of emperors, and institutions persisted under new rulers. Bryan Ward-Perkins, by contrast, emphasizes the contraction of trade, coinage, towns and literacy in the West. A bishop working in a Roman city is evidence of continuity; his presence does not tell us how many coins or how much pottery reached the people around him. Both kinds of evidence belong in the account.

The strongest explanation brings these developments together. Unsettled succession, thin finances and long frontiers had left the empire vulnerable before the movement of steppe peoples brought a major external shock. Rulers and commanders made choices under pressure, many reasonable as they appeared at the time. Their combined consequences could nevertheless be disastrous: each loss of taxable land left less money for defense, and a weaker army found it harder to protect what remained. This is a cascade, not a single blow.

The East’s survival tests the explanation. Christianity, one-man rule and heavy taxation existed there too, so none alone accounts for the different outcomes. Constantinople’s defenses and access by water helped protect a government supported by richer, more urban provinces. Revenue and transport turned those advantages into armies and diplomacy. Choices and chance affected the timetable: Valens attacked too early at Adrianople, the western court mishandled Alaric, and expeditions against Africa failed. The comparison helps explain why losses that the East could absorb became harder for the West to reverse.

WHY IT HAPPENED

Historians and their questions. Historians bring questions from their own times to the evidence. Gibbon emphasized superstition and despotism, concerns recognizable in an Enlightenment writer; the 1930s brought attention to economic collapse, and overextension resonated during the Cold War. Scholars now investigate pandemics, climate shifts and migration, using evidence that includes ice cores, genomes and shipwreck counts. The growing record can answer new questions, while the choice of questions still deserves scrutiny. We can examine a historian’s argument, its evidence and what it leaves aside, just as the atlas’s field questions invite us to do.

Compare the surviving East. The eastern empire shared Christianity, imperial monarchy and Roman law with the West, yet endured for another thousand years. That comparison rules out any one of those shared conditions as a sufficient explanation of the different outcomes. It also directs us toward differences: the East had a defensible core and denser sources of revenue, and the two halves faced the fifth-century movement of steppe peoples differently. Geography, money and exposure need to be considered together.

Roman prestige after western rule. Western imperial power disappeared, but its authority remained useful to successors. Rulers minted coins in emperors’ names and legislated in Latin; Frankish kings held consular titles, and the Church retained elements of Roman administrative geography. European rulers continued to treat Rome as a standard of legitimacy long afterward. Its prestige could grow even as its political power vanished: a king could invoke Roman authority without restoring the state that had exercised it.

WHAT IT CHANGED

Lessons from the map. Across twelve chapters, several relationships recur. Early Roman alliances gave some defeated communities a stake in the new order; arrangements sustained by fear faced different strains. Unsettled succession repeatedly opened the way to civil war. In the late West, lost tax revenue weakened armies and made further territory harder to defend. These are arguments about particular Roman events. To use them elsewhere, we must ask whether the same mechanisms are operating in the other case.

An argument with a long afterlife. Later thinkers used Rome to ask questions about their own societies. Machiavelli read Livy for lessons about republics. The American founders drew on Roman precedents and fears in institutions including term limits, civilian command and a Senate. Gibbon wrote as Britain’s empire was rising. Such comparisons can illuminate a crisis when they explain how events work in both cases; a resemblance to Rome is a starting point for that inquiry.

Follow a territory. Free Explore lets you follow a territory through these changes. Trace Africa from Carthaginian to Roman to Vandal control, Asia Minor from Hellenistic to Roman and still Roman at the end, or Gaul from Vercingetorix through the Gallic Empire to the Visigoths. Open the dossiers as you go. Each change of color stands for a longer history, and the Field Exam offers a way to test what you have learned from the map.

DISCUSSION QUESTION

“Rome did not fall; it was transformed.” “Rome fell, and civilization measurably collapsed with it.” How can each side make its case, and what matters in choosing between them?

The case for transformation begins with what remained: aristocrats wrote Latin, kings governed with Roman law and bishops, and the Church carried institutions into the successor kingdoms. On this view, “decline” can also express a preference for classical monuments over later forms of life. The case for fall points to material evidence from the fifth- to seventh-century West: less long-distance trade and coin use, smaller towns, changes in literacy and even smaller cattle. Many people appear to have had access to fewer goods and services, although conditions varied by place. Both accounts describe real changes. The choice of emphasis matters because a history centered on elites who retained their position can miss losses borne by others, while an account of collapse can miss what communities preserved and remade. Present concerns can shape the choice: continuity may reassure readers anxious about change, while collapse can warn about fragile systems. The evidence still has to tell us what happened, where and to whom.

AN INTERESTING FACT

Under Ottoman rule, Greek Orthodox subjects were administered as the Rum milleti — the “Roman nation.” Greek villagers continued to call themselves Romioi, Romans, into the twentieth century, although most spoke no Latin. The Roman name also remains visible in Rome itself. Manhole covers, buses and fountains bear SPQR, Senatus Populusque Romanus, the Senate and People of Rome. The republican formula predates Caesar and remains part of the city’s public life.