The National Guard of the United States, part of the reserve components of the United States Armed Forces, is a reserve military force, composed of National Guard military members or units of each state and the territories of Guam, of the Virgin Islands, and of Puerto Rico, as well as of the District of Columbia, for a total of 54 separate organizations. All members of the National Guard of the United States are also members of the militia of the United States as defined by . National Guard units are under the dual control of the state and the federal government.