Fort Barrancas mostly by enslaved African-American workers. January 8, 1861, more than three months before the American Civil War officially started at Fort Sumter, South Carolina, a company of 50 U.S. Army soldiers stationed at Fort Barrancas, under the command of John H. Winder fired upon a militia. This militia was Florida state troops under Colonel William Henry Chase demanding that the U.S. troops surrender the fort. Lieutenant Adam J. Slemmer, acting commander in Winder's absence, had the troops fire shots meant to repel the militia. Lt Slemmer knew that Fort Pickens was easier to defend, so he spiked the guns at
Battle of Gloucester Point (1861) surrendered Fort Sumter to the Confederates and as the earliest reported Civil War military engagement in Virginia. Like other early engagements between Union gunboats and Confederate shore batteries, the battle at Gloucester Point was part of the Union Navy effort to blockade the Southern States in general and the Chesapeake Bay in particular. The engagement also was part of the effort by Confederate forces to deny the use of rivers in Virginia to Union military and commercial traffic. On April 15, 1861, the day after the U.S. Army garrison surrendered Fort Sumter to Confederate forces, President Abraham Lincoln called for