The map is color–coded to show the areas where slavery was prohibited by State Law, slavery was prohibited b.Ī map of the United States at the time of the Kansas–Nebraska Act (1854) which allowed settlers to determine whether or not slavery would be allowed in their territories. United States and the Slavery Prohibition Issue, 1850Ī map of the United States and territories at the time of the slavery prohibition issue in 1850, after the Missouri Compromise of 1820. The map shows the westward expansion of the United States, with the. Ī map of the United States in 1830 showing the states and territories, the joint–occupation with Britain in Oregon Country, and the British and Spanish possessions at the time. The map is color–coded to show absolutely free states, states undergoing gradual abolition. Slave and Free Areas after the Missouri Compromise, 1820Ī map of the United States at the time of the Missouri Compromise (1820) showing the free states and territories, slave states and territories, the British and Spanish possessions at the time, and the Oregon Country.Ī map of the United States in 1821 showing the states and territories which either accepted or abolished slavery after the Missouri Compromise of 1820. Historic and contemporary maps of the United States, including physical and political maps, early exploration and colonization period, territorial expansion maps, climate maps, relief maps, population density and distribution maps, vegetation maps, and economic/resource maps.