The National Guard is a military reserve organization of the United States Armed Forces that is based in each of the 50 U.S. states, the District of Columbia, and three U.S. territories. It is among the regular reserve components that become part of the U.S. Army and the U.S. Air Force when activated for federal missions. The National Guard is officially created under Congress's Article I, Section 8 enumerated power to "raise and support Armies". All members of the National Guard are also members of the organized militia of the United States as defined by 10 U.S.C. § 246. National Guard units are under the dual control of U.S. state or territorial governments and the U.S. federal government.
The majority of National Guard soldiers and airmen hold a civilian job full-time while serving part-time as a National Guard member. These part-time guardsmen are augmented by a full-time cadre of Active Guard and Reserve (AGR) personnel in both the Army National Guard and Air National Guard, plus Army Reserve Technicians in the Army National Guard and Air Reserve Technicians (ART) in the Air National Guard.