Fort O'Rourke 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 convene discussions of secession. The Virginia State Convention passed an ordinance
Fort Sumter fort. When the Civil War ended, Fort Sumter was in ruins. The U.S. Army worked to restore it as a useful military installation. The damaged walls were re-leveled to a lower height and partially rebuilt. The third tier of gun emplacements was removed. Eleven of the original first-tier gun rooms were restored with 100-pounder Parrott rifles. From 1876 to 1897, Fort Sumter was used only as an unmanned lighthouse station. The start of the Spanish–American War prompted renewed interest in its military use and reconstruction commenced on the facilities that had further eroded over time. A new massive concrete blockhouse-style