Hospitalman O'Donnell was a member of the U.S. Navy serving with the 1st Marine Division. He was Killed in Action while tending his wounded comrades on June 24, 1952. Hospitalman O'Donnell, serving with a rifle platoon on a combat outpost forward of the main line of resistance, displayed exceptional courage and devotion to duty when the position was attacked and overrun by a numerically superior enemy force. Although seriously wounded, he continued to expose himself to heavy enemy small arms and artillery fire, moving about the trench line from bunker to bunker giving aid where needed and personally carrying wounded men to cover until he collapsed and died of his wounds, gallantly giving his life for his country. His heroic actions were directly responsible for the saving of the lives of several Marines.