U.S. Naval District (Areas Established for General Military Control)
District Headquarters Potomac River Naval Command. The Potomac River up to the Great Falls, the District of Columbia, and the Counties of Prince Georges, Montgomery, St. Mary's, Calvert, and Charles in Maryland; Arlington, Fairfax, Stafford, King George, Prince William, and Westmoreland Counties in Virginia, less the Marine Barracks, Quantico, Virginia and the Marine Barracks, Washington, D.C. Navy Yard, Washington, D.C. Severn River Naval Command. Anne Arundel County, Maryland. United States Naval Academy, Annapolis, Md.