After a difficult battle in Congress, Missouri entered the Union in 1821 as part of a package of
compromises. Maine was admitted as a free state to balance slavery in Missouri, and a line drawn at latitidue 36° 30' put most of the rest of the Louisiana Territory off-limits to slavery in the future.
There were 11 free states and 11 slave states before the Missouri Compromise. The admission of Missouri as a slave state... View the full answer