An interactive map that clearly shows the change in the status of slavery in territories from the Missouri Compromise to the Compromise of 1850. Click on the map to see the status before and after the Compromise of 1850.

Presents key ideas for examining the events surrounding the Missouri Compromise.

Presents key ideas for examining America's involvement in the Mexican War, westward expansion and the concept of Manifest Destiny, the Compromise of 1850, and the individuals involved in these issues.

A map of the United States showing the effects of the Compromise of 1850. The map is keyed to show the free states and slave states, and notes California admitted to the Union as a free state; the Nebraska Territory as free by the...

A map of the United States at the time of the Missouri Compromise of 1820. The map is keyed to show the free states by State Action, the free Northwest Territory by the Ordinance of 1787, the free territory north of the Compromise Line,...

A map of California, the Utah Territory, and the New Mexico Territory in 1850 showing the effect of the Compromise of 1850, a series of bills intending to settle the issue of slavery and abolition raised in the territories after the...

A map of the United States showing the results of a test vote of the Compromise of 1850 in the House of Representatives. The Compromise of 1850 was a series of bills attempting to resolve the territorial slavery controversy following the...

A map of California and the western territories at the time of the Compromise of 1850. The compromise was a series of bills dealing with the slavery issue, and under its provisions California was admitted to the Union as a free state,...

A map of the United States in 1821 showing the results of the Missouri Compromise of 1820 over the issue of prohibition of slavery. The map is coded to show the areas of the Free States, the Slave States, the Michigan Territory as Free...

Toggle back and forth on this interactive map to see how the Kansas-Nebraska Act of 1854 completely negated the Missouri Compromise. Click on the map to see where slavery was permitted before 1854 and then after. Be sure to click on the...

Interactive and animated maps and timelines of historical events and time periods in American history from pre-European times until post-World War II.

Presents key ideas for examining how the Articles of Confederation were replaced with the Constitution and the compromises that were reached during debates.

Presents key ideas for examining the events and issues that led to the American Civil War.

Provides detailed electoral facts for the presidential election of 1876 won by Rutherford B. Hayes, one of the most disputed presidential elections in American history.

A map of the United States at the time of the passing of the Compromise of 1850 (September, 1850). This compromise was a series of bills attempting to resolve territorial and slavery issues raised by the Missouri Compromise (1820) and...

A map of the United States in 1821 showing the states and territories which either accepted or abolished slavery after the Missouri Compromise of 1820. The map is color-coded to show absolutely free states, states undergoing gradual...

A map of the United States and territories in 1821 after the Missouri Compromise, showing the Free States and territories, the Slave States and territories, and the transitional territories at the time. The map is color-coded to show the...

A map of southeastern border of Alaska and Canada showing the area of boundary dispute and the boundary established by the Hay-Herbert Treaty between Britain and the United States in 1903. The map shows the coastline and fjords of the...

A map showing the boundary dispute between the British colonies of Pennsylvania, Maryland, and Delaware between 1681 and 1767. The map shows the lands in dispute, as English King Charles II paid his debt to William Penn by issuing him a...

A map of the United States in 1854 showing the results of the test-vote on the Kansas-Nebraska Bill in the House of Representatives, which would repeal the Missouri Compromise of 1820 and allow territorial settlers to determine if...

A map of the southern border of Alaska and Canada showing the area of boundary dispute and the boundary established by the Hay-Herbert Treaty between Britain and the United States in 1903. The map shows the coastline and fjords of the...

A map of the northern Pacific coastland of North America showing the territorial dispute of the Alaska boundary from the Anglo-Russian Treaty of St. Petersburg in 1825 that established the British claims, the purchase of the area by the...

A map of the United States in 1860 showing the states and territory boundaries at the time, and is color-coded to show the slave States and distribution of slaves, the free states, and the territories, all open to slavery under the...

A 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. The map is color-coded to show the Free States (including...