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there was a debate about the federal government right to restrict slavery
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freeing black people and antislavery had began helping those escape from southern plantations to the northern via Underground Railroad
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from 1830's to the 1860's the movement to abolish slavery in America was gaining strength to do so
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there was a another tenuous compromise to negotiate the resolve the question of slavery in territories
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in just 50 years the slavery population reached nearly 4 million
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Lincoln issued a preliminary emancipation proclamation
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he made it official that “slaves within any State, or designated part of a State…in rebellion,…shall be then, thenceforward, and forever free.”