Fort O'Rourke Fair Haven. No visible remains of the fort can be found. Fort O'Rourke Fort O'Rourke is a former Union Army installation now located in the Belle Haven area of Fairfax County in the U.S. state of Virginia. It was the southernmost fort built to defend Washington, D.C. in the American Civil War. Following the surrender of Fort Sumter in Charleston, South Carolina, on April 14, 1861, President Abraham Lincoln declared that "an insurrection existed," and called for 75,000 troops to be called up to quash the rebellion. The move sparked resentment in many other southern states, which promptly moved to
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