In 1820, there was a debate over whether Missouri would enter the Union as a slave state or a free state. Congress made a compromise, saying that Missouri would be a slave state, but all states North of the latitude 36°30′ would be free, including Maine.
Fine.... But we get Maine, and all states North of latitude 36°30′
In 1832, Andrew Jackson passed a tariff, and South Carolina nullified the tariff. While congress wanted to compromise and adjust the tariff, Jackson instead passed a force bill that allowed military force to enforce the tariff. While the conflict was eventually resolved, it created the idea of State's rights, and the idea of secession.
Damn you Jackson
Mexican American War-1846-1848
The Nueces river is the border, not the Rio Grande!
The Mexican American War was an important turning point, because it showed that America was willing to expand westward through peaceful and non-peaceful means. In 1846, the war started over a border dispute, and ended with the US on top.
Oh really? What about Manifest Destiny, huh?!!?!
Let Kansas decide for itself. Hooray for Popular Sovereignty!!
What about the Missouri Compromise?
The Kansas-Nebraska act stated that New States had the right to choose whether they were a free state or a slave states, which contradicted the Missouri compromise and started conflict in those new territories.
I sure do love railroads
In 1859 John Brown led a battalion to Harper's Ferry Virginia, in an attempt to start a slave revolt. This attack was what made the Civil War inevitable.
Violence is the only way to stop Slavery!!
Wow, that guy's crazy. There's no way the US will go to war over this issue
John Brown’s raid on Harper’s Ferry-1859
Election of Abraham Lincoln-1860
That's it, now we gotta secede
When Abraham Lincoln was elected in 1860, that was the last straw for the South, and even though Lincoln promised he would not get rid of slavery in states where it already existed, the South seceded anyway.