The Compromise of 1850 led to the Civil War because it had one part that pleased one side and angered the other. For example: California becoming a free state made northerners happy, and angered southerners.
The Fugitive Slave Act led to the Civil War because it angered northerners. It could arrest a slave in free territory, and return them to their owner. It could also arrest anyone who helped runaway slaves.
Uncle Tom's Cabin being published led to the Civil War because it opened peoples eyes, and proved that slavery was no joke.
The Kansas Nebraska Act led to the Civil War because it angered northerners causing protests and violence. This time was called "Bleeding Kansas."
The Pottawatomie Massacre led to the Civil War because it led to even more violence in Kansas.
The Dred Scott Decision led to the Civil War because many people thought it was unfair because most of the Supreme Court Justices were from the South.
John Browns raid on Harpers Ferry led to the Civil War because it was the last straw. It angered and scared most southerners.
The Election of 1860 led to the Civil War because it angered southerners. It also proved that the south was losing political power.
When the Confederacy formed it led to the Civil War because Lincoln wanted them to come back to the Union. Confederates refused, and attacked Fort Sumter.