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v t e American Civil War Defenses of Washington, D.C.
Departments	Department of the East Department of Washington, D.C. Department of the Potomac Military District of Washington Department of the Rappahanock Defenses of Washington, D.C. Department of Washington
Union Army Forces	Army of the Potomac XXII Corps
Potomac Approaches	Fort Washington (MD) Fort Foote (MD) Battery Rodgers (VA)
Arlington Line	Fort Marcy Fort Ethan Allen Fort C. F. Smith Fort Bennett Fort Strong Fort Corcoran Fort Haggerty Fort Morton Fort Woodbury Fort Cass Fort Whipple Fort Tillinghast Fort McPherson Fort Buffalo Fort Ramsay Fort Craig Fort Albany Fort Jackson Fort Runyon Fort Richardson Fort Barnard Fort Berry Fort Scott Battery Garesche Fort Reynolds Fort Ward Fort Worth Fort Williams Fort Ellsworth Fort Lyon Fort Farnsworth Fort Weed Fort O'Rourke Fort Willard
Northwest Quadrant	Fort Cross (MD) Fort Kirby (MD) Fort Sumner (MD) Battery Alexander (MD) Fort Simmons (MD) Fort Davis (MD) Battery Benson (MD) Battery Bailey (MD) Fort Mansfield (MD) Battery Cameron Battery Parrott Battery Kemble Battery Martin Scott Battery Vermont Fort Bayard Fort Gaines Fort Reno Battery Rossell Fort Kearny Battery Terrill Battery Smead Battery Kingsbury Fort DeRussy Battery Sill Fort Stevens
Northeast Quadrant	Fort Slocum Fort Totten Fort Slemmer Fort Bunker Hill Fort Saratoga Fort Thayer Fort Lincoln Battery Jameson
Eastern Branch	Fort Mahan Fort Chaplin Fort Meigs Fort Dupont Fort Davis Fort Baker Fort Wagner Fort Ricketts Fort Stanton Fort Snyder Fort Carroll Fort Greble
National Park Service (Web) Map of defenses in 1865