The United States ArmyReserve is the federal reserve force Armyreserves are a part of an army which is normally activated only during emergencies such as a war.
Together, the ArmyReserve and the Army National Guard The United States National Guard is a significant component of the United States armed forces military reserve.
ArmyReserve soldiers may be soldiers who left the active Army after a period of service, or they may have enlisted directly into the Reserve.
The Army of the United States was re-established for the Korean War and Vietnam War and was demobilized upon the suspension of the draft.
Although the present-day Army exists as an all volunteer force, augmented by Reserve and National Guard forces, measures exist for emergency expansion in the event of a catastrophic occurrence, such as a large scale attack against the US or the outbreak of a major global war.
The civilian executive is the Secretary of the Army who heads the United States Department of the Army, formerly called the Secretary of War who headed the United States Department of War or the War Office for short, at the founding of the Republic.