The Missouri compromise was passed in 1820 which basically recognized Missouri as a slave state and Maine as a free state. It was meant to keep a balance ofslave and free states
Missouri = slaves Maine = Free
Compromise of 1850
The Compromise of 1850 was basically the Fugitive Slave Law which was supposed to stop slaves from running away into the new territory which was being acquired (i.e California and Texas). The government was trying to contain slavery in the South.
Uncle Tom's Cabin 1852
A novel by Harriet Beecher Stowe which contained very graphic description of what slavery was like which helped lay down groundwork for the civil war.