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Many officers who had trained at West Point gained experience in the war in Mexico and later played prominent leadership roles during the Civil War.

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The ten year agreement established by the compromise only pushed the nation further against slavery, making many in the South fear the end of slavery, and many in the North crave the end of slavery, the very issue which would push the South to secede after Abraham Lincoln's election as president

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The election of Lincoln and the perceived threat to the institution of slavery proved too much for the deep southern states. South Carolina acted almost immediately, calling a convention to declare secession.The election of 1860 shaped the future of the United States by heralding the end of slavery and marked by a time of unprecedented violence in the nation.

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The Emancipation Proclamation confirmed their insistence that the war for the Union must become a war for freedom. It added moral force to the Union cause and strengthened the Union both militarily and politically

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PRESIDENTIAL RECONSTRUCTION lasted from 1865 to 1867

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PRESIDENTIAL RECONSTRUCTION lasted from 1865 to 1867

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President Andrew Johnson implemented a plan of Reconstruction that gave the white South a free hand in regulating the transition from slavery to freedom and offered no role to blacks in the politics of the South.