In 1836 Massachusetts freed slaves in the state. But a year later in 1837, Calhoun that slavery is a positive good.
The confederates create their constitution
On December 20, 1860 South Carolina also became a secede state to the Union.
Battle of Fort Sumter
Lincoln was elected President in 1861 but nearly won. But the southerners already hated Lincoln cause they knew he would want to abolish slavery.
Treaty of Appomattox
By the South creating their own constitution it would allow them to have the same rights as the United States. But would allow them to create their on laws which which would allow them to have their own Government. Which would lead to the Civil War.
On April 12, 1861 but it was also the first conflict with the North and South, 11 Union soldiers died, and 4 Confederates died. Which made it the first battle of the Civil War.
The treaty of Appomattox was the the treaty that helped ,and slavery and the Civil War. But it also helped putting the South under military jurisdiction.