The Missouri Compromise was written by Henry Clay. The compromise was caused by the north and south arguing over what states allowed slavery. As a result, It forbade slavery in Louisiana and anywhere north of the 36/30 parallel.
1854- Bleeding Kansas
Nat Turners Rebellion was a slave rebellion that took place in Virginia. Rebel slaves killed 55 to 65 people, at least 51 being white. 56 slaves were accused of being part of the rebellion and were executed.
1859 - John Brown's Raid
The Kansas-Nebraska Act allowed people in Kansas and Nebraska to decide for themselves whether or not they would allow slavery. The act served to repeal the Missouri Compromise.
1861 - Attack on Fort Sumter
Bleeding Kansas was a series of violent civil confrontations which emerged a political debate over slavery. This led to the establishment of the republican party.
John Brown lead a small group on a raid against a federal armory in attempt to start an armed slave revolt. Brown was hanged for murder and treason against the commonwealth of Virginia.
Fort Sumter had been the source of tension between the Union and Confederacy for several months. Major Robert Anderson led an attack by the Confederate army. This attack lasted four years until the United States army surrendered.