Tags: Military Structure.
Fort Greble was an American Civil War-era Union fortification constructed as part of the defenses of Washington D.C. during that war. Named for First Lieutenant John Trout Greble the first West Point graduate killed in the U.S. Civil War it protected the junction of the Anacostia and Potomac rivers and from its position on a bluff in the Congress Heights precluded any bombardment of the Washington Navy Yard and southeastern portions of the city.
