Answer:
Abraham Lincoln called for troops right after the firing on Fort Sumter.
Explanation:
The bombing of Fort Sumter, a fort that housed the Federal Army, at the entrance to the bay off Charleston, South Carolina, took place on April 12, 1861.
After South Carolina declared secession from the Union on December 20, 1860, its example was followed by six other states in the southern United States, and they formed an independent Confederation. In early April 1861, North Carolina authorities demanded that the Federal Army leave Fort Sumter, a fort located in an area no longer considered part of the Union. The Union refused to give up the fort, and when the deadline for the ultimatum passed, the Confederate army began artillery barrage fire, which lasted until the surrender of the fortress. No life was lost on either side in the direct conflict. President Abraham Lincoln used this event as a symbolic justification for calling 75,000 volunteers into the Union Army for the purpose of suppressing the insurgency.