In 1820 the Missouri Compromise ... allowed slavery. The North wanted to block the spread of slavery. They were also concerned that an extra slave state would give the South a political advantage.

The issue was resolved by a two-part compromise. First, Missouri gained admission to the Union as a slave state, with a provision that portions of the Louisiana Territory lying north of 36' 30 ...

The Missouri Compromise of 1820 kept an uneasy alliance for many years between the North and South. However, when California became a state further compromise had to be created. The Democrat ...

When Missouri sought statehood ... slaves who had run away to the North. The compromise, while not wholly satisfactory to either the North or the South, temporarily preserved the Union.