what did the missouri compromise effect
First, Missouri would be admitted to the union as a slave state, but would be balanced by the admission of Maine, a free state, that had long wanted to be separated from Massachusetts. Second, slavery was to be excluded from all new states in the Louisiana Purchase north of the southern boundary of Missouri.n an attempt to keep a legislative balance between the pro-and anti-slavery factions, the Missouri Compromise delineated which states would be free and which would not. African Americans obviously opposed slavery and news of some congressional opposition to its expansion circulated widely within slave communities.