The Army Reserve celebrates its birthday on April 23 each year, celebrating contributions to two World Wars, the Cold War, Korea, Vietnam, Persian Gulf War, and many other missions. There are Army Reserve communities located in every state in the Union, plus the District of Columbia, Guam, American Samoa, Puerto Rico, and the U.S. Virgin Islands. Reservists have deployed to roughly 30 countries.

Famous Army Reservists include Leonard Nimoy, John Fogerty of Creedence Clearwater Revival, Alan Alda of MASH fame (yes, he did serve a six month tour in Korea as part of his military duty), and Malcolm Forbes. Director Mel Brooks and Senator Daniel Inouye also served in the Army Reserve.