The American Civil War, 1840–1877 · THE MAP IN SEP 1850

Map of the United States in September 1850

The Compromise of 1850

The United States in September 1850: The Compromise of 1850. The map shows who held what: The Union, Mexico, 1840–54.

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Map of the United States in September 1850: The Compromise of 1850. Colours show The Union, Mexico, 1840–54. — SEP 1850 · 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: 1840 · reconstruction: 1845 · reconstruction: 1846 · reconstruction: 1848 · vector: 1860 state-interface reference · vector: us-51c90d654cd9 · vector: utah-newmexico1850

Layer records and reconstruction methods

On the ground

The Compromise of 1850 left settlers in the Utah and New Mexico territories to decide whether to permit slavery, a policy known as popular sovereignty.

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