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 a trained military engineer, built-up overwhelming strength to challenge Fort Sumter. Fort Moultrie had three 8-inch Columbiads, two 8-inch howitzers, five 32-pound smoothbores, and four 24-pounders. Outside of Moultrie were five 10-inch mortars, two 32-pounders, two 24-pounders, and a 9-inch Dahlgren smoothbore. The floating battery next to Fort Moultrie had two 42-pounders and two 32-pounders on a raft protected by iron shielding. Fort Johnson on James Island had one 24-pounder and four 10-inch mortars. At Cummings Point on Morris Island, the Confederates had emplaced seven 10-inch mortars, two 42-pounders, an English Blakely rifled cannon, and three 8-inch Columbiads, the latter