Portal:American Civil War/Selected event/06
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Fort Corcoran was a wood-and-earthwork fortification constructed by the Union Army in northern Virginia as part of the defenses of Washington, D.C. during the American Civil War. Built in 1861, shortly after the occupation of Arlington, Virginia by Union forces, it protected the southern end of the Aqueduct Bridge and overlooked the Potomac River and Theodore Roosevelt Island, then known as Mason's Island. The fort was named after Colonel Michael Corcoran, commander of the 69th New York Volunteer Regiment, one of the units that constructed the fort. Fort Corcoran was home to the Union Army Balloon Corps and the headquarters of the defenses of Washington south of the Potomac River, and served throughout the war before being dismantled in 1866. Today, no trace of the fort remains, though a small historical marker has been erected by the Arlington Historical Society.
