was passed by the United States Congress on September 18, 1850 as the compromised between the slave holding interested and the northern free soldiers. 

Bleeding Kansas or the Border War was a series of violent civil confrontations in the United States between 1854 and 1861 which became a debate over the legality of slavery in the proposed state of Kansas

The dred scott decision

 in 1857, the United States Supreme Court issued a decision in the Dred Scott case, affirming the right of slave owners to take their slaves into the western territory. 

The election was held on Tuesday, November 6, 1860. In a four-way contest, the Republican Party nominees of Abraham Lincoln and Hannibal Hamlin emerged triumphant. The election of Lincoln served as the primary catalyst of the American Civil War.

Sectionalism is loyalty to one's own region or section of the country, rather than to the country as a whole.

The Compromise of 1850  five separate bills passed by the United States Congress in September  that defused a political confrontation between slave and free states on the status of territories acquired in the Mexican–American War

1820 The Missouri Compromise was a way to keep balance between the slave and non slave states.

Uncle Tom's Cabin  is an anti-slavery novel by American author Harriet Beecher Stowe. Which showed the attitudes toward African Americans and slavery in the U.S. and is said to have "helped lay the groundwork for the Civil War"