Fort Runyon - Credit: Wikimedia Commons
Fort Runyon - Credit: Wikimedia Commons
Fort Runyon was a timber and earthwork fort constructed by the Union Army following the occupation of northern Virginia in the American Civil War in order to defend the southern approaches to the Long Bridge as part of the defenses of Washington, D.C. during that war. The Columbia Turnpike and Alexandria and Loudon Railroad ran through the pentagonal structure, which controlled access to Washington via the Long Bridge. With a perimeter of almost , and due to its unusual shape it was approximately the same size, shape, and in almost the same location as the Pentagon, built 80 years later."Fort Runyon", Arlington Historical Society, Military-use structures . Accessed September 18, 2007.Google Maps location of Fort Runyon. Accessed September 18, 2007. Read more on Wikipedia
Source: en.wikipedia.org