map dc 1861 maps historic war washington topographical civil defenses national service park historyculture nps gov learn
civil fairfax 1864 loudoun counties fortifications 1861 rebel military
washington dc civil map war fort defenses forts during where battle 1861 surrounding around stevens maps lee city history bunker
dc washington map old 1851 ghosts city detailed scale large fees law maps courtesy america fairchild ghostsofdc article