The American Civil War, 1840–1877 · THE MAP IN JUN 1854

Map of the United States in June 1854

Gadsden and Kansas–Nebraska

The United States in June 1854: Gadsden and Kansas–Nebraska. Since September 1850, 1 territory changed status on this map: Mexico.

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Map of the United States in June 1854: Gadsden and Kansas–Nebraska. Colours show The Union. — JUN 1854 · THE AMERICAN CIVIL WAR, 1840–1877

These maps are reconstructed from published sources · Cliopatria v 0.2.1 · Newberry Atlas of Historical County Boundaries: historical states and territories

Source details

Cliopatria contributors / Seshat Global History Databank. Selected, combined, reprojected and corrected by Maps of History as described per layer.. CC BY4.0
The Newberry Library, Atlas of Historical County Boundaries. State/territory records unioned for the displayed date; disputed/joint territories excluded from exclusive US sovereignty.. Publisher permits commercial and noncommercial lawful reuse without fees; current terms supersede obsolete NC notice in archive

Legal US boundaries come from dated Newberry records. Secession and military control use separate source layers, while campaign corridors are educational geographic reconstructions rather than surveyed continuous fronts.

reconstruction: 1845 · reconstruction: 1846 · reconstruction: 1854 · reconstruction: 1854-07-01 · vector: 1860 state-interface reference · vector: kansas-nebraska1854 · vector: us-e24e487b916d

Layer records and reconstruction methods

What changes on the map

Mexico

Mexico, 1840–54 → Neighbors & the outside world

On the ground

On 30 May 1854, the 36°30′ line was repealed, leaving slavery in the Kansas and Nebraska territories to a vote of the settlers. Within two years, Kansas had become a battlefield.
Popular sovereignty left the Utah and New Mexico territories open to slavery. Utah legalized servitude in 1852, and New Mexico passed a slave code in 1859. A federal law barred slavery from every territory on 19 June 1862.

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