On April 12, 1861, following diplomatic bickering over Lincoln's pledge to get supplies to Union troops at Fort Sumter, Confederate forces fired shots at the fort and Union troops surrendered, sparking the Civil War. In rapid succession, Virginia, North Carolina, Tennessee and Arkansas joined the Confederacy.
Conflict: American Civil War
Officeholder: Jefferson Davis
Explanation:
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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 Civil War.
