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 fort was nearly completed, but the fortress was thus far garrisoned by a single soldier, who functioned as a lighthouse keeper, and a small party of civilian construction workers. Under the cover of darkness on December 26, six days after South Carolina declared its secession, Anderson abandoned the indefensible Fort Moultrie, ordering its guns spiked and its gun carriages burned, and surreptitiously relocated his command by small boats to Sumter. South Carolina authorities considered Anderson's move to be a breach of faith. Governor Francis W. Pickens believed that President Buchanan had made implicit promises to him to keep Sumter unoccupied