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  first slaves were brought over
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  cotton gin was a machine created in the south which caused tention between north and south
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  they wanted to create an island in africa for slaves
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  many people started to oppose slavery and go to the side of the free soil party
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  fugitive slave law
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  made northerners know how bad slavery is
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  Republican Party created by antislavery people
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  john brown led people from kansas to the east to protest
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  john browns raid 1859
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  war between north and south