Loretta Perfectus Walsh became the first American active-duty Navy woman, the first woman to enlist in the U.S. Navy, and the first woman allowed to serve as a woman in any of the United States armed forces, when she enlisted as a sailor in the U.S. Naval Reserve on March 17, 1917. Walsh subsequently became the first woman U.S. Navy petty officer when she was sworn in as Chief Yeoman on March 21, 1917.

Yeoman (F) was an enlisted rate for women in the U.S. Naval Reserve during World War I. The first Yeoman (F) was Loretta Perfectus Walsh. At the time, the women were popularly referred to as "yeomanettes" or even "yeowomen", although the official designation was Yeoman (F).