The United States Army Reserve is the federal reserve force of the United States Army. Together, the Army Reserve and the Army National Guard constitute the reserve components of the US Army.
Army Reserve soldiers may be soldiers who left the active Army after a period of service, or they may have enlisted directly into the Reserve. Reserve soldiers generally perform training or service one weekend per month (inactive duty for training) and for two continuous weeks at some time during the year (annual training). Many reserve soldiers are organized into Army Reserve units, while others serve to augment active Army units.
The Continental Army was formed on June 14, 1775, before the establishment of the UnitedStates, to meet the demands of the American Revolutionary War.
The Army of the UnitedStates was re-established for the Korean War and Vietnam War and was demobilized upon the suspension of the draft.
The civilian executive is the Secretary of the Army who heads the UnitedStates Department of the Army, formerly called the Secretary of War who headed the UnitedStates Department of War or the War Office for short, at the founding of the Republic.