Margaret "Peggy" Wierum Reeve graduated from a boarding school in Providence, Rhode Island, and later lived in Pittsfield, Massachusetts, where she was employed as a secretary for Eaton Paper Corporation. She married in 1941, and while her husband was serving overseas Reeve joined the WAC.
On 30 March 1944, Reeve was inducted into the WAC. She was sent the following month to Fort Oglethorpe, Georgia, for basic training. Following basic, she was assigned to Westover Field in Massachusetts, where she did secretarial work in a personnel unit with the Army Air Forces. The unit was transferred in the summer of 1945 to Seymour Johnson Air Base in North Carolina. Reeve was discharged as a corporal on 26 October 1945.
Following their discharges, the Reeves moved to Boston, Massachusetts, and later to Anderson, South Carolina, where Peggy Reeve attended Anderson Junior College on the GI Bill. She later took classes at the University of North Carolina at Greensboro, and worked as a secretary for several local institutions, including the American Friends Service Committee.