Stumpf joined the
United States Army from
Milwaukee, Wisconsin, and by April 25, 1967, was serving as a
specialist four in Company C, 1st Battalion,
35th Infantry Regiment,
25th Infantry Division. On that day, during
Operation Baker near
Đức Phổ in the
Republic of Vietnam, Stumpf rescued three wounded comrades despite heavy fire and single-handedly disabled an enemy
bunker. He was subsequently promoted to
staff sergeant and awarded the
Medal of Honor for his actions. Stumpf reached the rank of
sergeant major before retiring from the army. ==Medal of Honor citation==