First Lieutenant Canfield was the pilot of a F-84E Thunderjet fighter with the 154th Fighter Bomber Squadron, 136th Fighter Bomber Wing. On 10 March 1952, while on a combat mission, his aircraft received a direct hit by anti-aircraft fire and crashed. His remains were not recovered. His name is inscribed on the Courts of the Missing at the Honolulu Memorial.

Canfield was awarded the Air Medal, the Purple Heart, the Korean Service Medal, the United Nations Service Medal, the National Defense Service Medal, the Korean Presidential Unit Citation and the Republic of Korea War Service Medal.