Opha Mae Johnson (February 13, 1900 – January 1976) was the first woman to enlist in the United States Marine Corps. She joined the Marine Corps Reserve August 13, 1918.
By luck of being the first person in a line of 305 women waiting to enlist, Opha Mae Johnson of Kokomo, Indiana became the first woman to join the Marines in 1918. The Marines were looking to fill office and clerical roles in the States while all battle-ready male Marines were shipped to the frontlines of World War I. To help fill the vacancies, the Marines Corps opened enlistment to women for the first time–two years before women could even vote!