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
Battle of Gloucester Point (1861) surrendered Fort Sumter to the Confederates and as the earliest reported Civil War military engagement in Virginia. Like other early engagements between Union gunboats and Confederate shore batteries, the battle at Gloucester Point was part of the Union Navy effort to blockade the Southern States in general and the Chesapeake Bay in particular. The engagement also was part of the effort by Confederate forces to deny the use of rivers in Virginia to Union military and commercial traffic. On April 15, 1861, the day after the U.S. Army garrison surrendered Fort Sumter to Confederate forces, President Abraham Lincoln called for