Effects of the Missouri compromise for Maine

After the Senate and the House passed different bills and deadlock threatened, a compromise bill was worked out with the following provisions: (1) Missouri was admitted as a slave state and Maine (formerly part of Massachusetts) as free, and (2) except for Missouri, slavery was to be excluded from the Louisiana Purchase lands north of latitude 36°30′.

In an effort to preserve the balance of power in Congress between slave and free states, the Missouri Compromise was passed in 1820 admitting Missouri as a slave state and Maine as a free state.