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Abraham Lincoln defeated John C. Breckinridge, Stephen A. Douglas, and John Bell. In response to Lincoln's election victory, seven southern states seceded from the Union.

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A series of seven debates between Abraham Lincoln and Stephen Douglas during the 1858 U.S. Senate Campaign in Illinois.The campaign largely concerned the issue of slavery extension into the territories.

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South Carolina became the first slave state in the south to declare that it had seceded from the United States.

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California was able to enter the Union as a free states.

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An agreement that allowed Missouri to enter the Union as slave state and Maine top enter as a free state and outlawed slavery in any territories or states north of 36 degrees 30 degrees latitude.

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A nation formed by the southern states when they seceded from the Union.

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Boundary between Maryland and Pennsylvania, taken as the northern limit of the slave-owning states before the abolition of slavery.

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A plan that would divide the remainder of the Louisiana Purchase into two territories and allowed people in each territory to decide on the question of slavery.

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Sound Smart: The Kansas-Nebraska Act of 1854 | History

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An act that made it a crime to help runaway slaves and allowed officials to arrest those slaves in free areas.

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Sound Smart: The Fugitive Slave Act of 1850 | History

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The idea that political authority belongs to the people.

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A network of people who helped thousands of enslaved people escape to the North by providing transportation and hiding places.

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The Underground Railroad Explained: US History Review

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A legal case in which the U.S. Supreme Court ruled that a slave named Dred Scott who had resided in a free territory was not entitled to his freedom. African Americans were not ands could never be citizens of the United States.

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The Dred Scott Decision Explained: US History Review

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John Brown and his men killed five pro-slavery men in Kansas.

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An effort by John Brown to inialate an armed slave revolt in 1859 by taking over a U.S. arsenal at Harpers Ferry, Virginia.

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Men and women who are auctioned off and are later the legal property of another and forced to obey their owner.

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The History of Slavery In America (FULL)