Fort McNair is a U.S. Army installation located in Washington, D.C. It serves as a military base and is home to the National Defense University, which provides education and training for military and civilian leaders. The fort is named after General Montgomery C. Meigs, a prominent Union general during the Civil War. Established in 1791, Fort McNair has a rich history and has played various roles throughout its existence, including serving as a supply depot and a training facility. The fort is situated along the Anacostia River and is part of the larger Joint Base Myer-Henderson Hall complex.