US National Archives
Our Documents: Missouri Compromise (1820)
Read an original transcript, and view an image of a report on the Missouri Compromise of 1820. This legislation admitted Missouri and Maine as states into the Union.
OpenStax
Open Stax: The Missouri Crisis
This section of a chapter on "Westward Expansion" explains why the North and South differed over the admission of Missouri as a state and how the admission of new states to the Union threatened to upset the balance between free and slave...
American Rhetoric
American Rhetoric: Abraham Lincoln Address on Repeal of the Missouri Compromise
YThis is the text of Abraham Lincoln's Address on Repeal of the Missouri Compromise delivered October 16, 1854, in Peoria, Illinois.
iCivics
I Civics: Slave States, Free States
In this lesson, students learn about the balance between slave states and free states and their geography, including the Missouri Compromise and the Compromise of 1850.