The War Room — WW2, 1936–1945 — the study guide

CHAPTER 1 · 1936–1938 · SEP 1938

The Gathering Storm

In 1936, France had the military strength nearby to intervene when German troops entered the demilitarized Rhineland. Britain and France protested, and the German move stood. Here was a breach of the postwar settlement that France had the means to resist. Why did it hold back?

The prospect of another European war carried enormous weight. Voters and statesmen remembered the industrial slaughter of 1914–18, and another general war seemed almost unthinkable. The Depression had weakened democratic governments while helping the Nazis turn resentment of the 1919 settlement into political power. Britain was still rearming, and France was unwilling to act without British support. Nor did the recent record of international cooperation offer much encouragement: the League of Nations had failed to stop Japan in Manchuria and Italy in Abyssinia. Governments considering resistance to Germany had to reckon with these weaknesses.

Now consider what the same events taught Hitler. German troops had entered the Rhineland, Britain and France had objected, and Germany had kept what it took. A quick, limited move could therefore put his opponents in a difficult position. By the time they agreed on a response, Germany might already control the territory in dispute; reversing the change would then require them to risk the war they wanted to avoid. Each challenge to the postwar order gave Hitler another opportunity to see whether opposition would lead to force. Intervention in the Spanish Civil War provided practical preparation too. The Luftwaffe tested aircraft, crews and tactics in combat, while Germany presented its expansion as a crusade against communism.

At Munich in 1938, Britain and France had a further reason to consider concession. Germany had absorbed Austria in March, and Hitler now demanded the Sudetenland. They regarded the proposed border change as defensible on ethnic grounds. If Hitler wanted to bring German-speaking territory into Germany, granting this demand might settle the dispute. Even if a wider conflict eventually came, postponement would give them more time to prepare. This was the case for concession, and its appeal depended on treating Hitler’s demand as a limited one.

Britain and France accepted that case. Czechoslovakia paid the entire price, losing its mountain fortifications, much of its industry and any say in its own fate. Consider what those losses meant for the bargain: the country facing German pressure had surrendered resources with which it could resist further demands. The hope of a lasting settlement rested on Hitler being satisfied with what he had received.

Germany’s seizure of Prague in March 1939 destroyed that hope. German rule was now extending over Czech territory beyond the German-speaking areas Hitler had claimed to seek. Appeasement lost its credibility, and Britain guaranteed Polish independence. The pressures behind the earlier concessions had been real, and leaders had still made choices whose consequences accumulated. Each unopposed revision strengthened Germany and weakened collective security—the ability of states to resist aggression together. By 1939, the argument had moved beyond adjusting a disputed border. Britain and France had to decide whether further conquest would be met with armed resistance.

WHY IT HAPPENED

Versailles and Nazi revisionism. Germany lost territory and military strength under the 1919 settlement. The Nazis used resentment of those terms to build support for expansion, falsely describing each breach as a limited correction.

Depression and political weakness. Economic crisis damaged moderate parties and helped the Nazis come to power. It also put pressure on British and French military spending, while making support for another major war harder to secure.

Memory of 1914–18. Voters and leaders remembered the mass slaughter of 1914–18. Postponing another war seemed worth taking risks, especially when more time could help their countries rearm.

Failed collective security. The League of Nations failed to enforce its responses to Japan in Manchuria and Italy in Abyssinia. Those failures showed how an aggressor could act while other states struggled to agree on enforcement.

WHAT IT CHANGED

Czechoslovakia becomes vulnerable. Czechoslovakia’s border defenses lay in the Sudetenland. Losing them left the country exposed; Germany seized the rest in March 1939, gaining the Škoda arms works as well.

Stalin considers a German agreement. The Soviet Union’s exclusion from Munich added to its distrust of Britain and France. An agreement with Berlin came to look like a way to gain time and a security buffer.

Britain guarantees Poland. Britain’s guarantee to Poland after Prague made resistance to further expansion a clearer commitment. Hitler read it as another bluff, raising the danger in the next crisis.

DISCUSSION QUESTION

Britain and France could probably have stopped Hitler cheaply in 1936–38. Why didn’t they?

Stopping Hitler meant accepting the possibility of another mass war. Leaders faced economic pressure, divided opinion, and forces that needed more preparation; delay did give them useful time to rearm. They also treated his demands as disputes over particular borders. Hitler saw concessions as steps toward a larger racial empire, so the bargain they hoped would settle the dispute encouraged further demands.

AN INTERESTING FACT

French intelligence believed that nearly 300,000 German troops were in and behind the Rhineland zone in March 1936—about ten times the actual number. Only about 3,000 soldiers crossed the Rhine bridges. Hitler later called the forty-eight hours after the march the most nerve-racking of his life. A familiar story holds that the troops had orders to retreat at the first French shot, but historians now doubt it.

CHAPTER 2 · AUG–OCT 1939 · SEP 1939

The Pact and the Partition of Poland

In August 1939 Hitler and Stalin made a bargain that gave each of them room to pursue an immediate goal. Their regimes remained ideological enemies, and both leaders expected a later struggle. For the moment, however, Hitler wanted to attack Poland without facing the Soviet Union at the same time. Soviet grain, oil, and metals would also help Germany withstand a British blockade.

Stalin had his own reasons to postpone a confrontation. His purges had damaged the army, and an agreement gave him time to rebuild it. It also promised territory that would push the Soviet frontier westward. The secret protocol drew a line through Eastern Europe, assigning territory to the two powers’ spheres; Poland’s partition followed from that agreement.

Germany invaded Poland on 1 September. Its forces attacked from several directions, using mobile armored formations to concentrate strength at selected points. Aircraft disrupted movement and communications, while radios helped commanders redirect units as the battle changed. Polish reserves faced attacks that developed faster than they could respond. This combination became known as Blitzkrieg, or lightning war, though it was never a single formal doctrine.

The speed of defeat needs more explanation than a story about German methods alone. Poland had long, exposed borders and was still mobilizing when the attack began. Britain and France declared war on 3 September, but help could not reach Poland in time. Their way to put pressure on Germany was an attack from France, and the limited French advance into the Saar never seriously attempted to do so. On 17 September the Red Army crossed Poland’s eastern border. With enemies advancing from both sides, sustained defense inside the country became impossible.

The partition gave two violent regimes control over Poland. German and Soviet authorities pursued different but overlapping programs of deportation, imprisonment, and murder as they dismantled the state. Defeat did not end Polish resistance: the government escaped into exile, and Polish soldiers, airmen, and intelligence officers continued to fight throughout the war.

Meanwhile Britain and France were formally at war with Germany, but the Allies mounted no land offensive strong enough to seize the initiative in the west. This period became known as the “Phoney War.” Poland had been conquered while the Western powers had yet to bring their strength to bear in a way that could save it.

WHY IT HAPPENED

Soviet distrust after Munich. Munich had excluded the Soviet Union. Stalin doubted that Britain and France would make an effective anti-German alliance, whereas a deal with Germany offered time, territory, and distance from a future front.

Hitler avoids two fronts. A neutral Soviet Union left Hitler free to attack Poland without an immediate war on two fronts and opened the way to Soviet trade. He expected Britain and France either to yield again or to fight without decisive effect.

Danzig as pretext. Demands over Danzig and the Polish Corridor provided Hitler with a public pretext. His larger purpose was Lebensraum, or living space, and the destruction of independent Poland.

WHAT IT CHANGED

The Phoney War begins. For eight months after Britain and France entered the war, the western land front was largely inactive. During this “Phoney War,” Germany had time to prepare its next campaign.

Two systems of occupation. Partition exposed Poles to two systems of occupation. Nazi authorities targeted Polish elites, clergy, and Jews from the beginning; Soviet authorities deported hundreds of thousands and murdered about 22,000 Polish officers and prisoners at Katyn and related sites. Poland suffered the war’s highest proportional national loss.

The USSR expands its buffer. The Soviet Union absorbed eastern Poland and then attacked Finland. Finnish resistance exposed weaknesses in Soviet forces, encouraging Hitler’s later, mistaken confidence that the USSR would collapse.

DISCUSSION QUESTION

Why would two sworn ideological enemies — fascism and communism — sign a pact?

Each leader expected an immediate benefit from postponing their ideological conflict. Hitler could attack Poland without a Soviet war and obtain raw materials. Stalin gained time, territory, and a wider buffer while Germany fought the Western powers. Both expected a later confrontation, but for now each judged the bargain useful.

AN INTERESTING FACT

Polish mathematicians had been quietly breaking the German Enigma cipher since 1932. Five weeks before the invasion, Polish military intelligence brought British and French officers to a bunker in the Kabaty woods south of Warsaw and gave each delegation a working replica of the machine. Bletchley Park’s wartime codebreaking built directly on that gift. Poland’s state disappeared from the map within weeks, yet the mathematics carried out that July helped destroy its occupier six years later.

CHAPTER 3 · APR–JUN 1940 · JUN 1940

Blitzkrieg in the West

Germany’s invasion of Norway in 1940 had an immediate purpose. Swedish iron ore reached the sea through Narvik in winter, and control of Norway protected that route. Norwegian ports and airfields also gave Germany bases facing the Atlantic. The campaign brought a loss as well as a gain: the German navy lost warships that would have mattered when an invasion of Britain was considered later that year.

The attack on France and the Low Countries began on 10 May. The Allies expected the decisive German advance to come through the northern plains, as it had a generation earlier. They sent their best mobile formations into Belgium to meet it. This decision made sense if the main attack came where they expected. But it also placed those formations far to the north of the route Germany had chosen for its principal thrust.

Seven German panzer divisions moved through the Ardennes, crossed the Meuse at Sedan and drove west to the Channel. Look at what that route accomplished. The armies that had advanced into Belgium were now separated from the rest of France, and their communications were cut. The German success did not depend on equipment that was generally superior to the Allies’. Commanders concentrated their forces at the breach, used radios to communicate, and gave junior officers room to act as the situation changed.

Could the Allies have stopped the advance? The German columns were crowded and exposed on the narrow Ardennes roads, and Allied reconnaissance did glimpse them. Its reports, however, did not overturn the expectation that the main danger lay farther north. French doctrine envisaged a slower, closely controlled battle. German commanders used local initiative to keep moving before French headquarters could restore a continuous front. By the time the Germans reached the coast, the northern armies faced encirclement and the French reserve was badly placed to respond.

At Dunkirk, evacuation saved much of Britain’s trained army, but almost all its heavy weapons were left behind. France fell within six weeks. In the south, the Vichy government, shown hatched on the map, collaborated with Germany while retaining a limited administration of its own.

The victory changed the position of every major power in Europe. Britain lost its principal continental ally, Italy joined Germany as France fell, and the Soviet Union expanded in the Baltic. Germany now held the Atlantic coast. Its gains were enormous, but they had not forced Britain out of the war.

WHY IT HAPPENED

Concentrating the armor. France had many capable tanks and assigned much of its armor to infantry support. Germany brought tanks and other arms together in formations coordinated by radio, allowing force to be concentrated at a breakthrough.

Risk through the Ardennes. The revised German plan sent its main weight along a route the Allies thought unsuitable for a large, rapid armored advance. That choice offered surprise, but crowded columns on narrow roads were exposed.

Norway’s gain and cost. Norway protected Swedish ore shipments and offered Atlantic bases. The warships Germany lost there were unavailable to cover a later invasion of Britain.

WHAT IT CHANGED

Trained troops survive. A pause in the German advance and the Luftwaffe’s failure helped about 338,000 Allied troops escape from Dunkirk. Britain abandoned much equipment but kept trained personnel for the war ahead.

Britain remains at war. Defeat in France left Britain facing invasion and pressure to seek terms. Churchill’s government chose to fight on, making control of the air the next test.

Other powers move. Italy entered the war as France fell, while the USSR annexed the Baltic states and Bessarabia. Germany’s rapid victory changed what other powers could attempt in Europe.

DISCUSSION QUESTION

France had more tanks and artillery, and comparable manpower. Why did its armies collapse so quickly?

The totals do not tell us where the forces were or how quickly they could be used. France sent its mobile reserve north and prepared for a controlled battle. Germany concentrated combined arms through the Ardennes, crossed at Sedan, and used radio communications to exploit the breach. The drive to the coast severed communications and separated the Allied armies before France could restore its front.

AN INTERESTING FACT

Some 41,000 vehicles of Panzergruppe Kleist queued for the Ardennes advance, in columns stretching 250 kilometers back beyond the Rhine. For days they were exposed to air attack. Allied reconnaissance pilots reported seeing the columns, including headlights burning on the night of 10–11 May, but headquarters continued to expect that the Ardennes was unsuitable for a major tank advance.

CHAPTER 4 · JUL–OCT 1940 · AUG 1940

The Battle of Britain

Operation Sea Lion was Germany’s plan to invade Britain. The Channel made it a formidable undertaking: the German navy had been battered in Norway, and a slow invasion fleet would face the Royal Navy. As long as RAF Fighter Command could operate, German aircraft could not be counted on to protect the crossing. The Luftwaffe therefore set out to destroy the fighters and the facilities that sustained them.

The attacks fell on shipping, radar stations, sector airfields, and aircraft factories. Britain’s answer was an organized system for bringing fighters to the raids. Radar and ground observers supplied reports; control rooms assembled the information and directed squadrons toward the places where they were needed. A small force could be used more effectively when it did not have to patrol everywhere at once.

By early September both sides had suffered heavily, and Britain’s supply of trained pilots was under severe strain. On 7 September the Luftwaffe shifted its main effort to London. Attacks on airfields continued, and historians dispute how close Fighter Command came to defeat. Nevertheless, the change eased sustained pressure on the defensive system when it was vulnerable, allowing damaged airfields time to recover.

London endured heavy bombing in the Blitz. Civilian suffering and destruction did not compel the government to surrender. On 17 September Hitler postponed the invasion; Germany’s first attempt to knock Britain out of the war had failed.

The defenders had advantages beyond the control rooms. A British pilot who survived a crash on home soil could soon return to combat, while a German airman shot down over Britain was usually lost as a prisoner. British factories replaced fighters faster than Germany had expected. The Luftwaffe, meanwhile, lacked a stable target plan and the heavy bombers needed to wear down an entire economy.

Radar did not make interception automatic, and endurance did not make bombing harmless. Britain’s survival depended on information, aircraft, pilots, command, and political resolve holding together, supported by geography and production. It kept a western foothold in the war and a link through which American material aid reached an ally still fighting in Europe.

WHY IT HAPPENED

The crossing problem. The Royal Navy stood between an invasion fleet and Britain. Germany’s navy had been badly weakened off Norway, so Sea Lion depended on the Luftwaffe gaining control of the air to protect the crossing.

A hoped-for settlement. Hitler had not planned a war with Britain and hoped that a show of force might bring negotiation. As Germany sought a decision, the air campaign developed with shifting target priorities.

A connected defense. Chain Home radar, ground observers, and sector control rooms helped Fighter Command find incoming raids and send fighters to meet them. Attacking aircraft did not by itself disable the network that directed them.

WHAT IT CHANGED

A base for return. Britain remained a western base from which the Allies could prepare their return to continental Europe in 1944.

Germany looks east. Hitler saw destroying the Soviet Union as a way to remove a source of British hope, as well as a means of pursuing his ideological aims. Barbarossa planning advanced in autumn 1940 while Britain still refused to yield.

American support grows. Accounts of British resistance and the Blitz reached American audiences and helped shift opinion. Destroyers-for-bases and then Lend-Lease in March 1941 supplied Britain before the United States entered the war. The “arsenal of democracy” was beginning to arm a fight it had not yet joined.

DISCUSSION QUESTION

Why did the shift from airfields to London help Britain continue the war?

Fighter Command stood in the way of invasion. Attacks on its airfields and pilots put the defense under pressure, so directing the main effort toward London gave parts of the system time to recover, even though attacks on airfields continued. The bombing inflicted immense civilian harm without compelling surrender. Historians still dispute how close Fighter Command had come to defeat.

AN INTERESTING FACT

Fighter Command’s “Few” came from many countries: nearly one in five was not British. Its summer roll included 145 Poles and 88 Czechoslovaks, alongside pilots from a dozen other nations. A handful of Americans had enlisted through Canada while the United States was neutral. No. 303 (Polish) Squadron entered battle on 31 August and became one of its highest-scoring units. Airmen from partitioned Poland helped defend the island from which the Allies would later return to Europe.

CHAPTER 5 · OCT 1940–JUN 1941 · MAY 1941

Mussolini’s Parallel War

A victory won by Germany could add little to Mussolini’s claim to be Hitler’s equal. He wanted Italy to acquire territory and prestige through a Mediterranean empire of its own. The regime called this a ‘parallel war.’ Its ambitions soon met the limits of the forces sent to carry them out.

Italian troops invaded Greece from Albania, but poor supplies hampered the attack and Greek forces drove them back across the border. In North Africa, a small British force routed a much larger Italian army. Then, in November 1940, twenty-one British biplanes flew from an aircraft carrier to Taranto and disabled the Italian battle fleet in harbor. Japanese naval planners studied the raid closely before Pearl Harbor. Aircraft launched at sea had shown they could reach and damage a fleet at anchor.

The defeats left Germany with campaigns to rescue. In Belgrade a coup overturned Yugoslavia’s alignment with the Axis; in April 1941 Germany invaded both Yugoslavia and Greece. Crete fell in May to German paratroopers, though the airborne assault cost them dearly. In Libya the newly arrived Afrika Korps, under Rommel, stabilized the front and pushed the British east. Germany had diverted forces intended for other fronts to secure gains opened by its ally’s ventures.

Those gains were not self-sustaining. Britain’s lifeline ran through Suez, and Axis armies in Africa needed supplies carried by sea from Europe. Malta, the ports and the fuel that crossed the water could determine how far an army could fight. Rommel repeatedly advanced beyond the reach of his supply system: the ground he won increased the distance supplies had to travel. In the Balkans, armed resistance would tie down Axis divisions for the rest of the war.

The Balkan campaigns also delayed and wore down German forces before the invasion of the Soviet Union. Did that delay cost Germany Moscow? Historians dispute the claim; wet ground, Soviet resilience and German logistics probably mattered more. Mussolini’s war left Germany with extra commitments, while the territory gained in the Mediterranean and Balkans offered no independent route to defeating Britain or winning the war.

WHY IT HAPPENED

Prestige and war. Hitler’s conquests gave Mussolini reason to fear that Italy would have no share in the new European order. His regime prized spectacle, and he believed Italy “needed a few thousand dead” to establish its claim. He chose wars against Greece and a British Empire he assumed was finished, seeking headlines and prestige more than a sound strategy.

Britain’s route through Suez. Suez connected Britain’s war effort with India, Persian oil and the Dominions. Britain therefore had reason to commit the forces it could spare to the Mediterranean. Malta and Tobruk had small garrisons, but their positions mattered far beyond their size in the struggle over that route.

The Belgrade coup. Yugoslavia signed with the Axis. Two days later, officers overthrew its government as crowds cheered in Belgrade. Hitler was enraged and ordered the country destroyed, adding an improvised campaign only weeks before his planned invasion of Russia.

WHAT IT CHANGED

The five-week question. The Balkan detour and a late spring moved the invasion of Russia from May to 22 June. Those five weeks invite a difficult question: would Germany have taken Moscow in December with an earlier start? Historians debate the answer; Chapter 6 follows the invasion.

Resistance in the Balkans. Occupation did not pacify Yugoslavia or Greece. In Europe’s largest resistance war, Tito’s partisans would tie down dozens of Axis divisions over four years. Their struggle also helped shape postwar Yugoslavia.

The desert campaign continues. The African campaign continued for two years as Rommel’s Afrika Korps and the British 8th Army pursued each other along the coast. Its finale came at a rail halt called El Alamein.

DISCUSSION QUESTION

Was the Balkan campaign a fatal distraction from Barbarossa, or a convenient excuse for its failure?

The campaign contributed delay, equipment wear and losses, but it cannot explain the failure by itself. Wet ground also constrained the start. German logistics and intelligence errors, together with Soviet reserves and strategic depth, remained decisive problems. The Balkans were a contributing factor, not the primary cause.

AN INTERESTING FACT

On 28 October each year, Greece observes Ohi Day, ‘No Day,’ remembering Prime Minister Metaxas’s rejection of Mussolini’s ultimatum before dawn in 1940. Legend gives his answer as the single word “Ochi!” According to the Italian ambassador, he spoke in the French of diplomacy: “Alors, c’est la guerre” — then it is war. Within weeks Greek soldiers had driven the invaders back into Albania, inflicting the first land defeat suffered by an Axis army.

CHAPTER 6 · JUN–DEC 1941 · DEC 1941

Barbarossa: The War of Annihilation

Germany attacked the Soviet Union on the assumption that a series of victories near the frontier would destroy the state behind the armies. About 3.6 million Axis troops crossed the border in the largest invasion in history. Three army groups drove toward Leningrad, Moscow and Ukraine. At Minsk, Smolensk and Kiev, German mobile formations surrounded enormous Soviet forces; by winter more than three million prisoners had been taken.

These were victories on the scale the German plan required, yet they did not produce the collapse the plan predicted. The Soviet state continued fighting and raised fresh armies. Meanwhile, each German advance carried the front farther from the supplies needed to sustain it. Railway lines had to be converted to a different gauge, trucks broke down on poor roads, and much of the army still moved by horse. Conquering distance made the next advance harder to supply.

The fighting cannot be separated from the purpose of the invasion. Nazi racial ideology treated Soviet territory as colonial Lebensraum, or living space, to be cleared and settled. Occupation policy planned hunger and forced labor; German authorities allowed most Soviet prisoners taken in 1941 to die. Einsatzgruppen and supporting units shot hundreds of thousands of Jews. The armies’ advance opened territory to the killers, while racial goals shaped the occupation itself.

The Soviet Union had room to lose ground, but space alone could not replace what had been lost. The state moved more than 1,500 industrial enterprises eastward and drew on its enormous population to raise new forces, including reserves German intelligence had failed to count. People resisted an invader whose rule openly promised enslavement and death. In December Soviet forces counterattacked near Moscow. Germany had failed to win the quick victory on which its plan depended.

Could an earlier start or a single concentrated drive on Moscow have changed the outcome? Historians debate both possibilities. Either would still have faced German shortages and the Soviet ability to regenerate armies and production. By winter, the struggle had become a war of attrition against an enemy with more manpower, greater industrial potential and growing access to Allied aid. Germany had defeated Soviet armies without destroying the capacity that replaced them.

WHY IT HAPPENED

Ideology: Lebensraum and the “Jewish-Bolshevik” enemy. Hitler’s central aim was colonial conquest in the East: the enslavement of Slavs and the annihilation of Jews and communists. Economic and strategic arguments were layered onto that fixed racial-imperial purpose. The aims of the invasion cannot be understood without it.

“Kick in the door and the whole rotten structure comes down”. Berlin expected the Red Army to collapse within weeks. Stalin had shot most of his senior officers in the purges of 1937–38, and Soviet performance against Finland in the Winter War reinforced that expectation. German intelligence counted roughly half the actual number of Soviet divisions, an error described in the original assessment as the greatest intelligence failure of the war.

Britain’s last hope. Britain fought on after invasion had become impossible (Chapter 4). Hitler believed it was counting on Russia and America for help. If he destroyed Russia before America was ready, he reasoned, Britain would have to make peace. In his calculation, the eastern invasion offered a way to end the western war.

WHAT IT CHANGED

A war of attrition Germany cannot win. After December 1941, Germany faced a prolonged contest of factories, oil and manpower. The Soviet Union, aided by growing Lend-Lease, dwarfed the Axis in these categories. Later German offensives sought a shortcut out of that arithmetic.

The Holocaust escalates to genocide. More than a million Jews had been murdered in mass shootings in the East by the end of 1941. At Wannsee in January 1942 officials coordinated the continent-wide “Final Solution”: the deportation of Europe’s Jews to extermination camps in occupied Poland. The map’s grey zones conceal the scale of the war’s deepest crime.

The Grand Alliance forms. Churchill, a longstanding opponent of communism, pledged aid to Stalin on the day the invasion began (“If Hitler invaded Hell…”). Days after Pearl Harbor, Hitler also declared war on the United States. His decisions helped complete the coalition of Britain, the Soviet Union and America that would destroy him.

DISCUSSION QUESTION

Why did predictions of a swift Soviet collapse prove wrong?

Observers saw the Soviet armies’ early defeats and expected the same losses to continue until the state collapsed. They underestimated its ability to replace those armies. Strategic depth gave it time to evacuate factories and mobilize, while coercion, patriotism and resistance to Nazi rule sustained the effort. German supplies could not maintain the same tempo across the distances involved. The battlefield losses concealed the capacity the Soviet state still possessed.

AN INTERESTING FACT

In besieged Leningrad, the Vavilov Institute held the world’s largest seed bank: hundreds of thousands of samples of wheat, rice and potato collected from five continents. During the starvation winter of 1941–42, its scientists guarded the collection and refused to eat it. At least nine died of hunger at their posts. The rice curator was found beside full sacks of grain. The institute’s founder, the geneticist Nikolai Vavilov, was himself starving in an NKVD prison; he died there in 1943. The scientists had kept the seeds for harvests after the war.

CHAPTER 7 · 1937–MAY 1942 · MAY 1942

Rising Sun: From China to Pearl Harbor

Japan’s war in China had already lasted four years when its leaders decided to attack the United States. Japan had seized Manchuria in 1931 and launched a full-scale invasion of China in 1937. Its armies took coastal cities and railways, but these victories did not bring surrender: the Chinese government withdrew inland to Chongqing and continued the war.

Occupation inflicted systematic violence on the population. At Nanjing, Japanese forces murdered and raped civilians and prisoners on a vast scale. These crimes belong to the history of human suffering, not to a calculation of moves in a contest. China’s continued resistance had a strategic consequence as well: it kept a large share of the Japanese army in China for years.

The occupation of southern French Indochina in 1941 was intended both to tighten pressure on China and to prepare a move south. The United States froze Japanese assets and cut off oil. Japan imported roughly 80 percent of its oil, mostly from the United States, so its reserves placed a limit on how long it could sustain operations. Japanese leaders rejected withdrawal and decided to seize the oil of the Dutch East Indies. First, they would try to cripple the American power that might interfere.

Six carriers attacked Pearl Harbor on 7 December 1941. They sank or damaged battleships, but the American carriers were at sea, and the fuel and repair facilities remained usable. Japanese forces then swept through Malaya, Singapore, the Philippines and the Dutch East Indies. In a hundred days Japan gained an immense empire. Holding it was another matter: each garrison depended on long sea routes that Japan’s merchant fleet and escorts could not reliably protect.

The decision for war reflected an institutional deadlock as well as a shortage of oil. The army refused to abandon China; the navy warned that dwindling fuel would eventually make a southern campaign impossible. A blow at Pearl Harbor and a fortified perimeter, Japanese leaders hoped, would buy time and persuade the United States to negotiate. For that plan to work, America had to accept its losses instead of mobilizing its much larger economy. The attack united American opinion for war, and Germany’s subsequent declaration of war on the United States joined the Asian and European wars. Japan had won its perimeter, but it faced an enemy able to grow stronger while its own empire was overextended.

WHY IT HAPPENED

An empire built on imported oil. Japan depended on imports for 80% of its oil, mostly from the United States. After the move into Indochina, the July 1941 embargo cut that supply. Existing reserves would support operations for a time, but a southern campaign would become harder as they ran down. The shortage helped set the timetable for Pearl Harbor.

The China quagmire. Chiang Kai-shek’s government yielded space and kept fighting. Four years of Japanese victories had brought territory, but no Chinese surrender. The army pressed for wider war; abandoning the campaign would mean relinquishing gains after heavy sacrifices, while further escalation seemed to offer a way forward.

Khalkhin Gol turns Japan south. At Khalkhin Gol on the Mongolian border in summer 1939, Soviet forces under Zhukov defeated a Japanese army. Tokyo later signed a neutrality pact with Moscow and turned toward the resource-rich European colonies to the south. The pact also helped the Soviet Union transfer forces from the east when Moscow was threatened.

The knockout-blow theory. Admiral Yamamoto had studied at Harvard and opposed the war. If Japan had to fight, he argued, it should strike the US fleet on the first day and establish a buffer costly enough to persuade America to negotiate. He doubted Japan’s prospects beyond the opening period: “I shall run wild for six months … after that I have no expectation of success.”

WHAT IT CHANGED

The sleeping giant. American industry was only one-tenth mobilized when war began, but within a year it out-produced the Axis. By 1944 the United States launched more ship tonnage in a month than Japan built in a year. Yamamoto’s warning about the first six months proved almost exactly right: Japan’s early advantage gave way to American production.

Hitler’s strangest decision. Germany declared war on the United States four days after Pearl Harbor, although it was under no obligation to do so. America now faced Germany as well as Japan, and Roosevelt’s “Germany first” strategy no longer faced the same political obstacle.

Empires lose their aura. Singapore’s surrender put 80,000 troops into the hands of a smaller Japanese force. The defeat shattered the image of European invincibility in Asia. The upheaval of 1942 became part of the history leading to independence in India, Indonesia and Vietnam.

DISCUSSION QUESTION

How could Pearl Harbor be a successful surprise attack and a strategic mistake?

The attack damaged the American battle line and gave Japan time to conquer territory. But the carriers and key base facilities survived, and American opinion united for war. Japan needed a negotiated settlement before superior US industry took effect; instead it faced full mobilization.

AN INTERESTING FACT

Tokyo intended a note breaking off negotiations to reach the United States about half an hour before the strike. It arrived in fourteen parts, and embassy diplomats, ordered to show it to no secretary, typed it themselves and badly. They delivered it nearly an hour after the bombs fell. American codebreakers reading the “Magic” intercepts had decoded it before the embassy finished. Even on time, the note would have ended talks rather than declared war.

CHAPTER 8 · APR–JUN 1942 · JUN 1942

Midway: Intelligence, Risk, and a Turning Point

Japan had planned an operation against Midway before the Doolittle Raid made it more urgent. In April 1942, sixteen American bombers took off from a carrier and struck Japan. Their material damage was small, but the home islands had been reached, embarrassing the navy sworn to protect them. Taking Midway could extend Japan’s defensive perimeter and draw the American carriers into the decisive battle Japanese commanders wanted.

The operation depended on surprise and on the Americans responding as expected. It also spread Japanese forces across a vast area. These choices mattered once the United States learned where to wait: a plan designed to bring the enemy to battle on Japan’s terms would meet an enemy already prepared for it.

At Station HYPO, analysts had partly broken the Japanese naval code JN-25. Message fragments and traffic patterns pointed to a target called “AF,” but the designation needed interpretation. The Americans sent a false report that Midway was short of fresh water. A Japanese message then reported a water shortage at AF, helping confirm that Midway was the target. Nimitz placed three carriers northeast of the atoll, accepting a real risk while still lacking complete knowledge of Japanese strength.

That intelligence put the carriers in position. The battle still depended on what happened in the air. American torpedo squadrons suffered terrible losses; their attacks disrupted Japanese defenses and drew fighters down toward sea level. Search errors, navigation, cloud cover and the timing of separate air groups all played a part. Dive-bombers found the Japanese carriers while aircraft were being refueled and rearmed. Three carriers were mortally hit within minutes on 4 June, and a fourth later that day. The United States lost one carrier.

The battle brought rough carrier parity, but Japan and the United States could not replace their losses at the same rate. Japan had trained excellent aviators slowly and could not quickly restore its experienced crews. The United States was expanding a much larger system for training pilots and building aircraft and carriers. Codebreaking and command judgment had made the encounter possible; courage and timing helped turn it into victory. American capacity to replace losses helped make the shift in the balance last.

WHY IT HAPPENED

The Doolittle Raid. American aircraft had reached Japan, even though the Doolittle Raid did little material damage. That embarrassment strengthened the case for extending the defensive perimeter and seeking the decisive carrier battle Japanese commanders wanted.

Reading the target. HYPO’s partial reading of JN-25 pointed to a target called “AF.” A false report that Midway lacked fresh water helped establish its identity. Japan planned to trap the Americans; Nimitz could prepare an ambush of his own, though intelligence offered a chance rather than a guarantee.

A dispersed operation. Six months of conquest preceded Japan’s ambitious plan, which dispersed forces across a vast area and depended on surprise. The Aleutians operation formed another part of it. American foreknowledge put Japan’s assumption that it could choose the terms of the encounter in doubt.

WHAT IT CHANGED

A counteroffensive begins. Four fleet carriers were gone, weakening Japan’s ability to support further expansion, and its perimeter stopped growing. Two months later, in August, US Marines landed at Guadalcanal. The counteroffensive had begun, although the struggle for the initiative continued.

Replacing the losses. Ships were only part of Japan’s loss. Veteran pilots took years to train, and Japan lacked a mass training pipeline comparable to that of the United States. As Japan struggled to replace its experienced aviators, American supplies of pilots, aircraft and carriers expanded.

Another 1942 turning point. At Midway, intelligence placed the American force where timing and chance could give it an opportunity. The next chapter’s turning point, Stalingrad, shows Soviet commanders striking a different vulnerability in an advancing enemy.

DISCUSSION QUESTION

Was the American victory at Midway a matter of luck or calculated risk?

Both. Codebreaking and Nimitz’s deployment put American carriers in position; navigation, timing and disruption of Japanese defenses helped open the way for the dive-bombers. Preparation made that opportunity usable, without determining every event. Without intelligence there was no ambush, and different timing might have produced a different result.

AN INTERESTING FACT

The Japanese public learned little of the defeat at the time. Radio announced a victory. Wounded sailors were brought ashore at night and isolated in guarded hospital wards as “secret patients”; many survivors went straight to distant garrisons, where they could not talk about the battle. Even much of the army high command was kept unaware that four carriers had been lost.

CHAPTER 9 · JUL 1942–FEB 1943 · NOV 1942

The Hinge: Stalingrad and El Alamein

The German offensive of 1942, Case Blue, had a practical object: the Caucasus oil fields. Germany lacked secure fuel for a long war, and taking the oil promised to help sustain it. The advance also brought German forces to Stalingrad, on the Volga. The city guarded a transport route and covered the flank of the Caucasus operation; its name made it a prize in a contest of prestige between Hitler and Stalin. Forces committed to the city could not also be concentrated on the oil fields. Germany secured neither objective.

Inside Stalingrad, fighting among the ruins restricted German advantages in movement and air power. Soviet commanders could see another opportunity outside the city. German troops had been drawn into the battle there, while Romanian armies with too few anti-tank weapons held long stretches of the flanks. On 19 November Operation Uranus struck those positions. Soviet pincers met near Kalach and enclosed the Sixth Army: the German force fighting for the city was now cut off by an attack on the armies protecting it.

Encirclement did not have to mean immediate surrender. Hitler could have allowed an attempt to break out, but he ordered the army to hold and trusted Göring’s promise of supply by air. Aircraft delivered only a fraction of what the pocket needed. The Sixth Army surrendered on 2 February 1943.

Meanwhile, British forces had prepared an offensive at El Alamein, where their material superiority helped break the Axis line and drive it west from Egypt. Operation Torch brought Anglo-American troops ashore in Morocco and Algeria, placing another Allied force to the west. Axis reinforcements kept fighting in Tunisia until May 1943, and the war on the Eastern Front continued. These campaigns did not produce an instant victory. They showed, however, that Allied production, shipping and coalition resources could sustain attacks across distant theaters at once. Germany and Italy still controlled vast territory, but they had less choice over where to meet the next pressure.

WHY IT HAPPENED

Oil and the Volga. Germany needed secure fuel, and Case Blue aimed at the oil of the Caucasus. Stalingrad also mattered: it stood on the Volga and covered the advance’s flank. Hitler divided forces between the two objectives, straining the offensive without gaining the oil or lasting control of the city.

The city and its name. Stalingrad’s name gave the battle a political charge beyond its military position. Hitler publicly vowed to hold it, and Stalin issued Order 227, “Not a step back.” Soviet planners, including Zhukov, meanwhile looked past the struggle in the city to the vulnerable armies on its flanks.

Supplies across the sea. Allied armies could fight in North Africa because ships brought them there and kept them supplied. Convoys carried American Sherman tanks to British forces in Egypt despite the U-boat threat; other shipping carried the Torch invasion force. The struggle in the Atlantic supported both campaigns.

WHAT IT CHANGED

A German army lost. The loss of a complete German field army carried a political shock as well as a military cost. Germany declared three days of mourning; occupied Europe and neutral Turkey, Spain and Sweden took notice. Germany still mounted major offensives in 1943, including Kursk, before the Soviet advance carried the war toward Berlin.

The Tunisian campaign. Montgomery’s forces came from the east, while Torch forces approached from the west. Germany and Italy sent reinforcements to Tunisia, but their armies there surrendered in May 1943. Around 250,000 prisoners were taken in what became known as a “second Stalingrad.” Allied Mediterranean routes could reopen, and Italy lay next.

“The end of the beginning”. Churchill called the victory at El Alamein “the end of the beginning.” The balance had changed, but the phrase left the great questions ahead: how long and bloody the war would be, and who would reach Central Europe first.

DISCUSSION QUESTION

Why did Hitler refuse to let the Sixth Army attempt a breakout?

Earlier stand-fast orders had sometimes held a front together, and Hitler saw retreat as a military and prestige loss. He also trusted Göring’s promise of air supply. A command system reluctant to convey bad news reinforced these judgments, even as the airlift delivered only a fraction of the roughly 600 tons requested each day.

AN INTERESTING FACT

At Christmas 1942, Kurt Reuber drew a mother and child in charcoal on the back of a captured Soviet map. A German army doctor and Protestant pastor, he hung the drawing in his bunker and inscribed it “Light, Life, Love.” It left the pocket on one of the last aircraft; Reuber remained and died in a Soviet prison camp in 1944. The Stalingrad Madonna now hangs in Berlin’s Kaiser Wilhelm Memorial Church, with copies in the cathedrals of Coventry and Volgograd, three cities burned by the war.

CHAPTER 10 · JUL–DEC 1943 · JUL 1943

Kursk, and the Fall of Fascist Italy

The front at Kursk offered Germany an appealing target. Soviet territory projected into German-held ground in a large salient, and attacks from north and south might meet behind it, trapping the forces inside. After Stalingrad, such a victory in Operation Citadel promised to restore confidence in Germany’s ability to take the initiative. Its very shape, however, made the likely target apparent. Soviet intelligence supplied warning, and German delays while awaiting new tanks gave Soviet commanders more time to prepare.

The Soviets chose to receive the attack. They laid minefields and built successive belts of anti-tank positions, keeping reserves farther back. A German breakthrough at one line would therefore lead to another line, not open country. German forces penetrated parts of the defenses, but could not close the encirclement. The Soviet counteroffensives followed, and by autumn the Red Army had reached the Dnieper. Germany never again mounted a strategic offensive in the east.

The cost of the defense deserves attention. Soviet losses near Prokhorovka were far heavier than older heroic accounts admitted. Yet the two sides needed different results. Germany needed a rapid encirclement; the Soviets needed to stop it and retain enough strength to counterattack. Their reserves and replacements allowed them to continue after heavy losses, while the defensive belts had made the attackers spend time and strength before those reserves went forward.

While Citadel was under way, the Western Allies landed in Sicily in July. Military failure had reached Italian soil, and Mussolini lost the support of his own Fascist Grand Council. The king ordered his arrest, and Italy signed an armistice in September. This did not end the fighting in Italy. German forces had prepared for an Italian departure; they occupied northern and central Italy, disarmed Italian units, rescued Mussolini and installed him over the puppet Salò Republic. Allied forces and Italian co-belligerents advanced from the south, while German troops, Italian fascists and Italian partisans fought across the peninsula.

The Sicily landing added another demand on Hitler’s forces, although Citadel was already failing on its own. In Italy, mountains, narrow fronts and prepared German lines slowed the Allied advance. The campaign removed an Axis partner and tied down German divisions, but it provided no quick road into Germany. Its strategic gains had to be weighed against a long and costly fight.

WHY IT HAPPENED

A victory after defeat. Stalingrad and Tunis had damaged German standing. Berlin wanted its allies, neutral states and its own public to see that Germany could still seize the initiative. Kursk offered a conspicuous opportunity, even though victory there could not itself win the war; standing still risked displaying weakness.

Warning and preparation. Moscow received warning from the Lucy spy ring and British Ultra decrypts. The salient itself suggested where an attack might come, and German delays while awaiting new tanks allowed further preparation. Soviet commanders used the time to build defenses and gather reserves for a counterattack.

The Mediterranean compromise. The Allies had to decide where they could fight next. At Casablanca, Americans wanted an invasion of France in 1943; the British judged Sicily more realistic given the available shipping and experience. The Mediterranean compromise would maintain pressure, seek Italy’s exit and draw German divisions south while the invasion of France waited until 1944.

WHAT IT CHANGED

The retreat west. Soviet counteroffensives carried the Red Army toward the Dnieper in autumn; Kiev fell in November. The war was moving west, and Germany had to defend a long front against continuing Soviet attacks.

Italy’s divided war. Italy’s armistice left a divided country at war. Allied and co-belligerent Italian forces fought from the south; in German-occupied territory, Mussolini’s Salò Republic fought Italian partisans. The Gustav Line divided the opposing forces in the campaign. The civil war within the wider conflict left scars long after 1945.

Experience for another landing. Sicily and Salerno gave the Allies experience in amphibious command and naval gunfire, as well as mistakes to learn from. That experience helped prepare the invasion of Normandy in 1944.

DISCUSSION QUESTION

Why did Soviet commanders choose to receive the German attack at Kursk before counterattacking?

Soviet commanders expected their prepared belts to slow the Germans and inflict losses before the reserves counterattacked. The choice required them to accept lost ground and trust the defenses to hold. They had the depth and replacements to absorb the blow and then attack an enemy that had spent strength trying to break through.

AN INTERESTING FACT

The story of Prokhorovka changed when Soviet archives became available. For decades the battle had been celebrated as a great tank clash that bled both sides equally. On 12 July the attacking 5th Guards Tank Army lost an estimated 200–300 armored vehicles, dozens in an anti-tank ditch dug by its own engineers; German losses were a small fraction of that. Stalin convened a commission and considered court-martialing the tank army’s commander, although the heroic account survived. The Red Army could absorb that costly day and continue its advance; the German panzer force could less readily afford even its smaller losses.

CHAPTER 11 · AUG 1942–OCT 1944 · NOV 1943

The Island Road

The fighting at Guadalcanal showed both what an Allied advance could achieve and what it might cost. Beginning in August 1942, the first sustained Allied ground offensive of the Pacific war drew men, ships and aircraft from both sides into six months of fighting. Tropical disease added enormously to the losses. When Japan evacuated the island in February 1943, the Allies had pushed back its perimeter. Yet a campaign that required a similar struggle for every defended island would be terribly expensive.

The alternative was leapfrogging. Planners selected positions that could support aircraft, ships and supplies for a further advance, while air and naval power isolated other strongholds. Rabaul retained its large Japanese garrison, but that garrison could no longer exercise its former influence on the campaign. The choice of an objective mattered: an airfield might put the next target within range, or an anchorage provide shelter for ships. An island that could be neutralized from the air might offer too little to justify the casualties of taking it.

Two advances carried this strategy forward. MacArthur's forces moved along the New Guinea coast toward the Philippines; Nimitz's drove through the Central Pacific toward the Marianas. Their rivalry wasted some effort, but Japan also had to prepare for attacks on several possible routes. Behind the arrows lay tankers, repair ships, engineers and protected convoys, without which the captured positions could not support a further move. Japan could fortify islands, but it could neither supply them all nor know which one would be attacked next.

American submarines attacked the merchant shipping that linked Japan to the resources it had conquered. The loss of that shipping weakened the connections on which the empire depended. From the Marianas, B-29 bombers could strike Japan itself; the return to the Philippines cut into the southern resource routes. At Leyte Gulf in October 1944, much of Japan's remaining fleet was destroyed as an effective offensive force. The perimeter was no longer a working network of mutually supporting positions.

WHY IT HAPPENED

Distance and supply. A Pacific offensive needed support over immense distances. Tankers carried fuel, floating dry docks repaired ships, and Seabee battalions built airfields. America's mobile fleet-base system brought that support forward. Japan's garrisons depended on sea routes too, but without a comparable system they went short as those routes became vulnerable.

Two routes across the Pacific. MacArthur's Army-led advance in the southwest and Nimitz's Navy-led drive through the center reflected rivalry between the services. Maintaining parallel offensives could waste effort, yet it also confronted Japan with several possible directions of attack. Defenders could not know in advance which position would be chosen.

The submarine campaign. Japan's island empire depended on ships to carry imported resources. American submarines sank more than half its merchant marine, steadily reducing the capacity to make those journeys. By 1945 the blockade was a major part of the pressure on Japan.

WHAT IT CHANGED

A shrinking perimeter. The red line retreats as the Allies take the Gilberts, Marshalls and Marianas in sequence. Each captured position helps expose the next. Behind that moving front, hundreds of thousands of men in bypassed garrisons face shortages and isolation; some grow food while waiting for relief.

The Marianas and Japan. The Marianas offered a base from which B-29 bombers could reach Tokyo. Their loss in June 1944 also contributed to the fall of General Tojo's government. The islands became a starting point for the endgame.

India and Burma. Japan's invasion of India was defeated at Imphal and Kohima in spring 1944 by Allied forces including Indian divisions. The defeat helped turn the fighting toward Burma and exposed the limits of Japan's claim to be Asia's liberator.

DISCUSSION QUESTION

Why isolate a fortress such as Rabaul, with its roughly 100,000-man garrison, instead of assaulting it?

The roughly 100,000 men at Rabaul could not make their strength count against the advance once Allied air and sea power suppressed their aircraft and cut supply, movement and communications. Assaulting them would risk heavy casualties for a position the Allies could leave behind. The comparison with Stalingrad is structural: a strongpoint depends on the system supporting it.

AN INTERESTING FACT

In the Solomons on 2 August 1943, a Japanese destroyer struck the torpedo boat PT-109. Its 26-year-old skipper, John F. Kennedy, helped a burned crewman toward an islet, towing him by a life-jacket strap clenched in his teeth. Two Solomon Islander scouts working with Allied coastwatchers, Biuku Gasa and Eroni Kumana, found the survivors. They carried a rescue message carved into a coconut husk through Japanese-held waters. Kennedy later kept the coconut on his Oval Office desk; it is displayed at his presidential library.

CHAPTER 12 · JUN–AUG 1944 · JUN 1944

Overlord and Bagration: Germany pressed from both sides

The Western Allies sent about 156,000 troops onto five Normandy beaches on 6 June 1944. Getting them there was an undertaking years in preparation. Ships had to cross the Atlantic safely; aircraft had to hinder German movement across France; landing craft and supplies had to be assembled in immense quantities. Once the troops were ashore, naval gunfire and the resources following them across the Channel helped them establish a foothold.

German commanders also had to decide where to place their reserves. Operation Fortitude gave them reason to expect a larger landing at Calais. False radio traffic, double agents and dummy armies supported that deception. Forces that might have been sent toward Normandy were consequently slower to move at a critical moment. The landing was a battle on the beaches, but it was also a contest over what the defenders believed was coming next.

Sixteen days later, on 22 June, the Red Army attacked in Belarus. At Tehran the Allies had agreed that an eastern offensive would accompany the invasion in the west. Operation Bagration fulfilled that agreement. Soviet concealment, partisan attacks and massed artillery helped break a front German troops had been ordered to hold; mobile forces then exploited the openings. Army Group Centre was destroyed, twenty-eight German divisions ceased to exist as effective formations, and the front moved roughly 500 kilometres toward the Vistula. Germany could no longer respond to a crisis on one front so easily by drawing reserves from the other.

Paris was liberated on 25 August. Warsaw's fate raised a different problem. The Polish Home Army had risen before Soviet troops arrived, hoping to establish its own authority in the capital. Soviet forces halted east of the Vistula while the Germans crushed the uprising. Historians still debate the respective weight of exhaustion, supply difficulties and Stalin's political calculation in that halt.

The advancing armies ended German occupation, but they did not bring the same political settlement everywhere. Western forces helped restore allied governments in France and Belgium. In the east, Soviet victory also gave Moscow the power to install governments it favored. The coalition was closing in on Germany as the future division of Europe was taking shape.

WHY IT HAPPENED

Preparing the crossing. The crossing depended on three years of preparation. Victory in the Battle of the Atlantic in 1943 protected the Allied buildup; air supremacy over France followed in spring 1944, at terrible cost to bomber crews. Artificial Mulberry harbors were prepared for towing across the Channel. The disastrous Dieppe raid in 1942 and losses in the Slapton Sands exercises showed planners dangers the invasion would have to overcome.

Fortitude and Calais. Fortitude presented German intelligence with a fictional First US Army Group aimed at Calais. False radio traffic, dummy equipment and double agents made the threat appear credible. German leaders kept forces near Calais after 6 June in expectation of another landing, affecting the troops available to oppose Normandy.

An allied timetable. At Tehran in November 1943, Stalin promised an eastern offensive alongside Overlord. The attacks in June 1944 put Germany under pressure from both directions at once. Reinforcing either front with troops from the other became more difficult.

WHAT IT CHANGED

The liberation of France. Operation Cobra broke the Allies out of Normandy; Operation Dragoon brought another landing on the Riviera. Paris was liberated on 25 August. Move the timeline to September to follow the advance across France. Germany faced powerful Allied armies in both west and east.

The eastern front broken. Army Group Centre's destruction opened the way for Soviet forces to reach Warsaw's suburbs by August. The advance continued in 1945 and brought the Red Army to Berlin. Normandy and Bagration belong together in the account of Germany's defeat: each applied pressure from a different direction.

Warsaw and the coming settlement. The Home Army wanted to free Warsaw before Soviet forces arrived, partly because it feared what their arrival would mean for Polish government. German forces crushed the uprising and devastated the city while the Soviets halted. Historians dispute the relative importance of exhaustion, supply difficulties and Stalin's political calculation in that halt. Warsaw revealed conflicts that would shape the postwar settlement.

The 20 July plot. On 20 July German officers planted a bomb at Hitler's headquarters. Hitler survived, and reprisals strengthened the regime's grip over the army. The plot did not produce a German surrender.

DISCUSSION QUESTION

Bagration destroyed four times more German divisions than Normandy, yet D-Day dominates Western memory. Why — and does it matter?

Normandy has a prominent place in Western national commemoration, films and accessible archives, a pattern also shaped by Cold War politics. Its risks were distinctive: a failed amphibious invasion would have been hard to repeat quickly. But the imbalance matters when it hides the scale of the Eastern Front or the experiences of countries between Germany and the Soviet Union. The two offensives pressed Germany at the same time.

AN INTERESTING FACT

German intelligence knew Juan Pujol García as ARABEL; Britain knew him as GARBO. The Spanish former poultry farmer supplied reports attributed to 27 sub-agents, all of them invented. Germany awarded him the Iron Cross for his D-Day reporting, and Britain appointed him MBE months later. After the war he faked his death and kept a bookshop in Venezuela, where a historian found him in 1984.

CHAPTER 13 · DEC 1944–MAY 1945 · FEB 1945

Closing the Ring

The Ardennes offensive was meant to change the political situation as well as the military one. In December 1944 Hitler sent his forces west in the hope of splitting the British and American armies and taking Antwerp. If the blow produced a rupture among the Allies, Germany might escape defeat. Surprise helped the attack at first, but the distance to Antwerp required fuel, transport, and reserves Germany did not have. Within weeks the offensive had failed, and the forces spent on it were unavailable for the defense of Germany.

The pressure now came from both directions. In January the Red Army advanced roughly 500 kilometres in three weeks during the Vistula–Oder offensive, reaching the threshold of the German heartland. In April American and Soviet troops met at the Elbe. Hitler killed himself in Berlin, and Germany surrendered unconditionally on 8 May.

The armies’ advance brought them to places that told another history of Nazi rule. Soviet troops liberated Auschwitz on 27 January; American and British forces reached Buchenwald and Bergen-Belsen in April. They found survivors and corpses, records, and the machinery of systematic persecution and murder. Six million Jews had been murdered in the Holocaust. Roma and Sinti, disabled people, Soviet prisoners of war, Poles and other Slavs, political opponents, gay men, and others were also persecuted and killed. The camps belong on the map as evidence and places of remembrance, not as measures of military progress.

Why did the regime continue to fight when its armies were being defeated? The Allies demanded unconditional surrender, and leaders responsible for immense crimes could expect punishment rather than a safe negotiated peace. Terror punished supposed defeatists, while propaganda encouraged fear of Soviet vengeance. Hitler still hoped the capitalist West and the Soviet Union would fall out; despite their distrust, they cooperated operationally until Germany was defeated.

The victors were already discussing what would follow. At Yalta in February, Roosevelt, Churchill, and Stalin negotiated occupation zones and postwar institutions, but their agreements left contested questions about Europe’s future. Each army would give its government practical power over the territory it occupied. The victory ended Nazi rule, while leaving the victors to contend over the political future of the continent.

WHY IT HAPPENED

Unconditional surrender and terror. The Allies announced their demand for unconditional surrender at Casablanca in 1943. For Nazi leaders implicated in immense crimes, a negotiated exit offered little prospect of safety. Goebbels’s propaganda presented “Bolshevik vengeance” as the alternative to resistance, while the terror apparatus hanged soldiers and civilians branded as “defeatists” from lampposts into the last week. Together, these pressures helped the regime keep fighting after victory had become implausible.

Hitler’s hope for a split. Hitler hoped that a powerful blow in the Ardennes would break what he called the “unnatural alliance” of capitalists and communists. The distrust was real, but the inference was wrong: the Western powers and the Soviet Union continued to cooperate operationally through Germany’s defeat. The Axis itself had never coordinated its war in the way Hitler imagined his enemies might fail to do.

Yalta and the peace. Roosevelt, Churchill, and Stalin met at Yalta in February 1945 and agreed on occupation zones, a United Nations, and “free elections” in liberated Europe. Those words left room for conflicting understandings. The agreements would matter, but so would the power each army exercised where it stood.

WHAT IT CHANGED

Evidence and postwar law. Liberation brought the evidence of Nazi crimes to a wider public. The postwar response drew on new legal and moral language: “genocide” was coined in 1944, the Nuremberg trials addressed “crimes against humanity” in 1945–46, and the Genocide Convention followed in 1948. The Holocaust also formed part of the context of Israel’s founding in 1948. “Never again” became a moral commitment often invoked and imperfectly honored.

A devastated Europe. Around forty million people had died in Europe. Cities lay in ruins, and tens of millions were displaced or expelled, including roughly twelve million ethnic Germans from the East. Borders moved west; Poland’s territory shifted about 200 km, a change reflected in the map’s modern outlines. The determination to build a different future contributed to the United Nations, postwar welfare states, and eventually the European project, even as new divisions emerged.

The armies and the division of Germany. The meeting at the Elbe brought American and Soviet troops together, but it did not itself fix Germany’s eventual division. Occupation zones had been agreed separately. Scrub forward one snapshot and see Chapter 15 for the postwar settlement.

DISCUSSION QUESTION

Could the Western Allies have reached Berlin first, and should they have tried?

A Western advance on Berlin was militarily possible. Eisenhower weighed the heavy casualties he expected against the capture of a city already assigned to the Soviet occupation zone. Churchill attached more value to the postwar leverage it might bring. The choice depends on uncertain casualty estimates, whether arriving first could have changed the agreed zones, and how unavoidable one considers the coming Cold War.

AN INTERESTING FACT

Historian Emanuel Ringelblum and the secret Oyneg Shabes group in the Warsaw ghetto wanted the victims’ own record to survive. Teachers, rabbis, economists, and writers collected tens of thousands of pages: testimony, diaries, and underground newspapers, as well as candy wrappers and tram tickets from daily life. They buried the archive in milk cans and tin boxes. Ringelblum was executed in 1944. Two caches were recovered from the rubble in 1946 and 1950; a third has never been found. The archive is inscribed in UNESCO’s Memory of the World register.

CHAPTER 14 · FEB–SEP 1945 · AUG 1945

The Downfall of Imperial Japan

By the time American aircraft attacked Japan’s cities with atomic bombs, the country had already endured a devastating campaign. Submarine warfare and blockade cut off food, fuel, and raw materials. B-29 incendiary raids burned urban areas, killing around 100,000 people in Tokyo on 9–10 March alone. These were civilian deaths on an enormous scale.

The fighting on Iwo Jima and Okinawa exposed another prospect. If battles close to Japan’s home islands had cost so much, an invasion of the islands themselves might be still more terrible. American casualty projections for a full invasion varied widely. That uncertainty would matter when people later argued about whether the atomic bombs had been necessary.

Defeat was approaching, yet Japan’s leaders could not agree on how to end the war. Civilian leaders quietly sought mediation, hoping for a favorable peace; military leaders wanted to fight a costly battle on Japanese soil first, in the hope of winning better terms. The Allies demanded unconditional surrender without clearly promising that the emperor could remain. Thus even leaders looking for a way out faced uncertainty about an institution central to Japan’s political order.

Hiroshima was destroyed by an atomic bomb on 6 August. On 8 August the Soviet Union declared war, and its forces invaded Manchuria during the night of 8–9 August. Japan had looked to Moscow as a possible mediator; it now faced the Soviet Union as an enemy threatening occupation from another direction. Nagasaki was bombed on 9 August. Even after these shocks the senior council remained divided, until Emperor Hirohito intervened to accept surrender. It was announced on 15 August and formally signed on 2 September.

American planners had weighed invasion, continued blockade, bombing, and the new weapon against uncertain casualty estimates. The August shocks fell on a state already weakened by blockade and destruction, and the hope of preserving the emperor shaped its leaders’ decision. Historians disagree about the necessity and relative weight of these pressures. Their interaction explains more than an account that assigns the decision to one blow alone.

WHY IT HAPPENED

A government of two minds. Japan’s civilian leaders looked to Moscow to mediate a peace by spring 1945. They did not know that Stalin had promised at Yalta to attack Japan. Military leaders instead wanted a decisive battle on the home islands, hoping its cost would persuade the Allies to offer better terms. Neither faction could settle the question alone, and an external shock would break the deadlock.

Unconditional surrender and the Emperor. The Potsdam Declaration demanded unconditional surrender and left the throne’s future unstated. Japanese leaders regarded the emperor as central to the nation and feared what the silence might mean. The eventual settlement kept him in place, helping make acceptance possible; while the decision was being made, that outcome had not been clearly promised.

The bomb’s momentum. The Manhattan Project began with the fear that Germany might build an atomic bomb, but its weapon was ready only after Germany’s defeat. By then $2 billion had been spent, and Truman had invasion casualty projections before him. He later said the decision “was never a decision”. The project’s momentum formed part of the setting in which the bomb was used. Target selection and the absence of a demonstration remain subjects of moral debate.

WHAT IT CHANGED

Surrender — and a preserved throne. The postwar settlement transformed Japan’s institutions while retaining the throne. Under American-led occupation, Japan was demilitarized and given a democratic constitution renouncing war; the emperor remained as a symbol. By 1951 the former enemies were allies. The combination invites us to consider the war aims the Allies achieved and the vengeance they forgave.

The Soviet week. The Soviet offensive called August Storm overran Manchuria in eleven days. Soviet forces also occupied Korea north of the 38th parallel, a hastily chosen American line on the map that became a lasting, heavily fortified border. The Korean and Vietnamese wars grew from struggles left unresolved by the 1945 settlement.

The nuclear age. The United States did not retain a monopoly on the weapon: the Soviet Union tested its own atomic bomb in 1949, four years after the war. Deterrence and arms races, and eventually the prospect of mutually assured destruction, shaped relations between rival powers over the next half-century.

DISCUSSION QUESTION

What ended the Pacific war: the atomic bombs, Soviet invasion, or blockade? Why does the answer matter?

The pressures worked together. Blockade and bombing weakened Japan before August; Soviet entry ended the hope of mediation and threatened attack from another direction; the atomic bombs added unprecedented shock and a public explanation for surrender. The weight given to each cause changes how we judge nuclear necessity, deterrence, and the reasons governments stop fighting.

AN INTERESTING FACT

In the spring after Hiroshima’s destruction, green shoots appeared on trees that had survived close to the hypocenter. About 160 within two kilometers lived, among them ginkgos, camphors, and a weeping willow, despite a rumor that nothing would grow in the city for seventy-five years. These hibakujumoku, “survivor trees,” are registered with nameplates. Their seeds and saplings are sent to cities around the world as living memorials; many still lean toward the hypocenter, a physical trace of the blast.

EPILOGUE · 1945 AND AFTER · OCT 1945

The World the War Made

What could the victors agree to do with the countries their armies occupied? At Yalta and Potsdam, the former allies negotiated over a map on which power was already unevenly distributed. Soviet forces held much of Eastern Europe, and Western forces held the west. Agreements mattered, but an occupying power could influence how promises were enforced. Germany’s occupation zones later became two states; Korea was divided at the 38th parallel.

The allies also differed over what security required. Soviet leaders, remembering repeated invasions, wanted controlled states between themselves and a possible enemy. Western governments saw Soviet control over those countries as expansion. The same arrangement that offered Moscow protection restricted the freedom of Germany’s neighbors and deepened Western fears. The final map shows the beginning of this rivalry as well as the end of the fighting.

The scale of destruction made reconstruction urgent. About sixty million people died, although estimates vary by country and category; the Soviet Union lost about 27 million and China perhaps around 20 million. Survivors faced displacement, famine, ruined cities and redrawn borders. Across Asia and Africa, independence movements pressed claims against weakened European empires, hastening the decline of colonial rule, often through further war.

The new international arrangements addressed different parts of the catastrophe. The United Nations sought collective security, while the Nuremberg trials established individual responsibility for state crimes. The Genocide Convention and Universal Declaration of Human Rights set out standards for the treatment of people. Bretton Woods and the Marshall Plan supported economic recovery, and European integration began to place strategic industries under shared authority.

Each settlement also involved a choice with costs. The UN Security Council gave the great powers a veto to keep them in the system, but that power could paralyze action. American aid helped rebuild Western Europe while tying it to a US-led economy. Retaining the Japanese emperor eased the occupation but limited accountability at the top. Power, local movements, institutional design and memories of failure all shaped the results. The war’s end opened a new political struggle; it did not produce a finished peace.

WHY IT HAPPENED

Armies and the peace. The negotiators at Yalta and Potsdam did not begin with a blank map. Armies already occupied much of Europe, giving their governments the power to enforce some decisions and resist others. German occupation zones later became separate states, while the division at the 38th parallel became a lasting Korean frontier. The position of forces helps explain the settlement; governments’ subsequent choices show how that position was used.

Security through buffer. Twice in thirty years the USSR had suffered invasion through Poland, at a cost of tens of millions of lives. Soviet leaders wanted control over neighboring states between Germany and Moscow to guard against another attack. Western governments saw that control as expansion, while people in the buffer states lost political freedom. Fear of another invasion helped explain Soviet policy, but it did not make its consequences for those neighbors disappear.

The productivity superpower. The United States had resources few other powers could match after the war: approximately half the world’s industrial output, an intact major economy and the atomic bomb. The Bretton Woods arrangements of 1944 placed the dollar at the center of the international monetary system. American influence over the postwar economic and security order rested in large part on this combination of productive, financial and military power.

WHAT IT CHANGED

The long peace — under a mushroom cloud. Since 1945 there has been no direct great-power war. Historians debate how much deterrence, exhaustion, institutions and luck contributed to that peace. Its limits become clear when we look beyond the great powers’ direct relations. Wars continued in the decolonizing world, including Korea, Vietnam and Angola, where outside powers supported opposing sides. A peace between powerful states could coexist with devastating fighting elsewhere.

Never again — the unfinished project. The catastrophe of 1939–45 helped produce human-rights law, refugee conventions and efforts to prevent genocide. Those commitments established reasons to act, but they did not ensure action when people were threatened. Atrocities in Cambodia, Rwanda and Bosnia tested them, and prevention often failed. The record leaves a question about what governments and others will do when warnings come.

Your map, your questions. In Free Explore, scrub the timeline and click a country to follow its war. Poland was erased and shifted westward; Finland fought three wars; Yugoslavia saw resistance; Spain watched as a neutral country. Choose one and trace its changes across the map. Each path brings a different part of the wider conflict into view.

DISCUSSION QUESTION

Was the Second World War “one war”? Argue both sides using what you’ve seen on this map.

The case for separate wars begins with their different origins: the conflicts in China and Poland, Barbarossa and the Pacific war started at different times, involved different actors and had different aims. By December 1941, however, alliances, production, shipping and strategy connected the theaters. Lend-Lease and coordinated offensives made outcomes in one theater matter to others. Several conflicts had merged into one global system.

AN INTERESTING FACT

Unexploded weapons keep the war present in the ground. German bomb-disposal services recover on the order of 2,000 tonnes of wartime ordnance each year, and discoveries still require evacuations. In December 2011, a falling Rhine exposed a 1.8-tonne British bomb at Koblenz; about 45,000 people, nearly half the city, left home while engineers defused it. The work remains dangerous. In 2010, three disposal technicians died at Göttingen while defusing a bomb dropped before any of them was born.