This was the withdrawal of eleven Southern states from the Union in 1860 that precipitated the American Civil War.

Secession is the withdrawal of 11 slave states from the Union during 1860.

lincoln presided over the union victory in the american civil war, which dominated his presidency. a former whig, lincoln ran on a political platform opposed to the expansion of slavery in the territories. his election served as the immediate impetus for the outbreak of the american civil war.