The Women's Army Corps (WAC) was the women's branch of the United States Army. It was created as an auxiliary unit, the Women's Army Auxiliary Corps (WAAC) on 15 May 1942, and converted to an active duty status in the Army of the United States as the WAC on 1 July 1943. Its first director was Colonel Oveta Culp Hobby. The WAC was disbanded in 20 October 1978, and all units were integrated with male units.

SPARS was the authorized nickname for the United States Coast Guard (USCG) Women's Reserve. The nickname is an acronym fashioned from the USCG's motto, "Semper Paratus"—"Always Ready" (SPAR). The Women's Reserve was established by the U.S. Congress and signed into law by President Franklin D. Roosevelt on November 23, 1942. The law authorized the USCG to accept women into its Women's Reserve as commissioned officers and at the enlisted level for the duration of World War II plus six months. Its purpose was to release male officers and enlisted men for sea duty by replacing them with women at shore stations. This same month, Dorothy C. Stratton was appointed director of the Women's Reserve and given the rank of lieutenant commander. She was later promoted to captain.