Where slavery would be allowed to spread into which area of the U.S?

Slavery was allowed to spread into the southern regions of the United States, particularly in states such as South Carolina, Georgia, Alabama, Mississippi, Louisiana, and Texas. The Missouri Compromise of 1820 and the Compromise of 1850 attempted to regulate the expansion of slavery into new territories, allowing it in some areas while restricting it in others. Ultimately, the question of slavery's expansion contributed significantly to the tensions leading up to the Civil War.