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 they could. Fort Sumter was designed to mount 135 guns, operated by 650 officers and men, but construction had met with numerous delays for decades and budget cuts had left it only about 90 percent finished in early 1861. Anderson's garrison consisted of just 85 men, primarily made up of two small artillery companies: Company E, 1st U.S. Artillery, commanded by Capt. Abner Doubleday, and Company H, commanded by Capt. Truman Seymour. There were six other officers present: Surgeon Samuel W. Crawford, First Lt. Theodore Talbot of Company H, First Lt. Jefferson C. Davis of the 1st U.S. Artillery, and