• !5-inch Rodman Cannon

    Civil War Defenses of Washington

    District of Columbia

A Letter Home from Fort Marcy

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Did You Know?

map of WDC and Atlantic Coastal Plain and Piedmont Plateau

The Civil War Defenses of Washington exist because of geology and topography. The strategic high ground where the fortifications are located stretches between two considerably different geologic terrains: the Piedmont Plateau to the north and west and the Atlantic Coastal Plain to the east.