Grahn was the first woman to serve on a United States Army General Court Martial.
[1] After the WAAC was dissolved she commanded the 2525th Women's Army Corps (WAC) unit in Fort Myer, Virginia.
In 1941-42 she went on to be a math instructor and women's counselor in Emmetsburg, Iowa at a junior college and high school.
[1][2] Hilliard met Edgar Grahn, a fellow faculty member at University of Idaho, and they married in 1950.
[2] Grahn died on August 3, 2006, and was buried with full military honors at Arlington National Cemetery.