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 Fort Sumter a siege until September). After pounding Sumter to rubble with artillery fire, a final amphibious operation attempted to occupy it (the Second Battle of Fort Sumter, September 1863), but was repulsed and no further attempts were made. The Confederates evacuated Fort Sumter and Charleston in February 1865 as Union Maj. Gen. William T. Sherman outflanked the city in the Carolinas Campaign. On April 14, 1865, four years to the day after lowering the Fort Sumter Flag in surrender, Robert Anderson (by then a major general, although ill and in retired status) returned to the ruined fort to raise the flag