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The cotton gin caused a rise in slavery. While it reduced the labor of removing seeds, it didn't reduce the need for enslaved labor.

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More land added as a result of the Mexican-American War. This caused a bitter debate about slavery.

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John Brown and his sons entered cabins along the Pottawatomie Creek and killed five people from a proslavery settlement.

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It convinced many people in the north that slavery was wrong, but some people in the south said that the picture was fake. This upset both the north and south.

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The withdraw of eleven states, following the election of President Lincoln.

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The war demonstrated the split between the United States. Southern states started to separate, and become the Confederate States of America.

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The Election of 1860 & the Road to Disunion: Crash Course US History #18

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John Brown led a small group on a raid to attempt to destroy the institution of slavery.

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Lincoln and Douglass argued about how they feel about slavery.

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Dred Scott sued for his freedom, but the U.S. Supreme Court stated that enslaved people were not considered citizens of the United States. So, he could not get any protection from the federal government or the courts.

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The Dred Scott Decision Featuring Justice Neil M. Gorsuch

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It created Kansas and Nebraska as territories. The act allowed the people of each territory to decide if they want to allow slavery.

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A law passed that made it legal to arrest runaway slaves from anywhere in the United States.

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A series of laws passed by the U.S. Congress in effort to try and settle issues for slavery. They disagreed whether slavery should be allowed in new states.

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When someone owns another person, and they are forced to work without pay.