Reserve components of the United States Armed Forces in the context of "United States Navy Reserve"

The Ready Reserve is a U.S. Department of Defense program which maintains a pool of trained service members that may be recalled to active duty should the need arise. It is composed of service members that are contracted to serve in the Ready Reserve for a specified period of time as a reservist or in active duty status. Members of the Ready Reserve are required to be prepared for mobilization or re-activation within a specified period of time, maintain a serviceable uniform, and maintain a degree of fitness.

Each of the reserve components of the United States Armed Forces is divided into the Ready Reserve, Standby Reserve, and the Retired Reserve.

The National Guard is a state-based military force that becomes part of the U.S. military's reserve components of the U.S. Army and the U.S. Air Force when activated for federal missions. It is a military reserve force composed of National Guard military members or units of each state, the territories of Guam, the U.S. Virgin Islands, Puerto Rico, and the District of Columbia, for a total of 54 separate organizations. It 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 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 & 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.

The United States Army Reserve (USAR) is a reserve force of the United States Army. Together, the Army Reserve and the Army National Guard constitute the Army element of the reserve components of the United States Armed Forces.

The Army National Guard (ARNG) is an organized militia force and a federal military reserve force of the United States Army. It is simultaneously part of two different organizations: the Militia of the United States (consisting of the ARNG of each state, most territories, and Washington D.C.), as well as the federal ARNG, as part of the National Guard as a whole (which includes the Air National Guard). It is divided into subordinate units stationed in each state or insular area, responsible to their respective governors or other head-of-government.

The Guard's origins are usually traced to the city of Salem, Massachusetts, in 1636. That year a regiment of militia drilled for the first time to defend a multi-community area within what is now the United States.

The United States Navy Reserve (USNR), known as the United States Naval Reserve from 1915 to 2004, is the Reserve Component (RC) of the United States Navy. Members of the Navy Reserve, called reservists, are categorized as being in either the Selected Reserve (SELRES), the Training and Administration of the Reserve (TAR), the Individual Ready Reserve (IRR), or the Retired Reserve.

The Air National Guard (ANG), also known as the Air Guard, is a federal military reserve force of the United States Air Force (USAF), as well as the "air militia" of each U.S. state, the District of Columbia, the Commonwealth of Puerto Rico, and the territories of Guam and the U.S. Virgin Islands. It, along with the Army National Guard component of each state, district, commonwealth or territory, makes up the National Guard of each region as applicable. Additionally, the ANG and the United States Air Force Reserve constitute the two air reserve components of the USAF.

When Air National Guard units are used under the jurisdiction of the state governor they are fulfilling their militia role. However, when federalized by order of the president of the United States, ANG units become an active part of the U.S. Air Force. They are jointly administered by the states and the National Guard Bureau, a joint bureau of the Army and Air Force that oversees the U.S. National Guard.

The United States Air Force Reserve (USAFR, AFR, or AFRES) is one of the United States Air Force's (USAF) two air reserve components, alongside the Air National Guard (ANG). The USAFR and ANG constitute the USAF's contribution to the reserve components of the United States Armed Forces. The USAFR represents the federal contribution to the reserve components while the ANG represents the states', certain territories', and the District of Columbia's contribution to the reserve components as the "air militia" of these entities.

The USAFR is overseen by the Air Force Reserve Command (AFRC), a major command (MAJCOM) of the United States Air Force, with its headquarters at Robins Air Force Base, Georgia. AFRC also plays an integral role in the day-to-day Air Force mission and is not strictly a force held in reserve for possible war or contingency operations. AFRC also supports the United States Space Force through the 310th Space Wing, pending the creation of a space reserve component. The "Chief of the Air Force Reserve" is, ex officio, the commanding officer of the AFRC and is typically a lieutenant general (a three-star general officer) and reports directly to the chief of staff of the Air Force.