Based upon this description in a1943 recruiting brochure, women were required to have at least two years of high school to enlist in the Women’s Army Corps (WAC)–though the high school requirement could be waived if a woman’s score on a Mental Alertness test indicated that she had “equivalent ability.”
I bet Aunt Marian was sweating that Mental Alertness test. According to the short biography of Aunt Marian that her sister Martha wrote, Aunt Marian only had an 8th grade education:
. . . She attended the Mountain Grove Country School–an elementary School. She did not attend high school. . .