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  Part of the Compromise of 1850, federal marshalls and law enforcement personel would be fined up to $1000 dollars for not apprehending a suspected runaway slave
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  Written by Harriet Beecher Stowe, this anti-slavery novel strengthened the beliefs of Americans in the North against slavery. Made Southern plantation owners angry.
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  Born slave Dred Scott sues for his family's freedom
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  Preston Brooks assaulted Senator Sumner with his heavy walking cane, in the Senate Chambers, until his cane broke.
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  People of African descent were not U.S. citizens and therefore were not protected by the Constitution
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  Hinton Rowan Helper's self-published anti slavery book, condemned slavery but not in the moralistic abolitionist way of Uncle Tom's Cabin
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  Series of debates between the then senator candidate Abraham Lincoln and Senaator Stephen Douglas over various topics including the Kansas-Nebraska Act, Dred Scott Decision and Bleeding Kansas
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  Raid on the U.S. Armory at Harper's ferry planned by John Brown
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  Election of the 16th president Abraham Lincoln
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  South Carolina secedes and forms the C.S.A. followed by the rest of the confederation