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

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

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 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 during the period of 1850 to 1850 showing the effects of slavery, the slave trade, and the abolition movement on territorial development. The map uses colored patterns to indicate the areas and phases of...

A map of the United States during the period of 1850 to 1850 showing the effects of slavery, the slave trade, and the abolition movement on territorial development. The map uses colored patterns to indicate the areas and phases of...