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
Fort Sumter an attack by South Carolina militia. The fort was not yet complete at the time and fewer than half of the cannons that should have been available were in place, due to military downsizing by President James Buchanan. In a letter delivered January 31, 1861, South Carolina Governor Pickens demanded of President Buchanan that he surrender Fort Sumter because "I regard that possession is not consistent with the dignity or safety of the State of South Carolina." Over the next few months repeated calls for evacuation of Fort Sumter from the government of South Carolina and then from Confederate Brigadier