What happened first in the civil war?

At the immediate beginning of the Civil War in April of 1861, Southern troops occupied Charleston Harbor's Fort Sumter, which had been bombarded into submission. Soon after, more states seceded from the Union, troops were raised and trained by both sides, skirmishes took place between small contingents of civilians and troops, and then, on July 21st of 1861, the war's first large-scale battle took place, the First Battle of Bull Run (or, First Manassas).