Harmon was born in
Cuero, Texas, on January 21, 1917. He attended the segregated all-black Daule High School before working in livestock production. During his service, Harmon became a Mess Attendant First Class and was serving aboard the
San Francisco during the
Naval Battle of Guadalcanal. On November 13, 1942,
San Francisco was raked by Japanese gunfire during the battle, killing nearly every officer on the bridge. Harmon rushed in to evacuate the wounded. While the ship was being raked by enemy gunfire, Harmon helped evacuate the wounded to a
dressing station. While doing so he deliberately stood between Bondsteel and enemy gunfire in order to protect his wounded shipmate. ==Honors==