The son of James H. and Barbara Wallace, Hazel LeRoy Wallace enlisted in July 1916, after learning to fly at a school in the United States. During the war, he scored fourteen victories flying the Sopwith Camel.
Listed as Hazel Le Roy Wallace in the London Gazette.
The Lethbridge Daily Herald, Lethbridge, Alberta, Monday, 19 August 1918
Distinguished Flying Cross (DFC)
Lieut. (T./Capt.) Hazel Le Roy Wallace.
A gallant and most capable leader, who in many engagements has displayed marked ability and courage, notably in a recent attack on an aerodrome when he led his flight against the group of hangars allotted to him at an altitude of between 100 to 200 feet. By direct hits he destroyed three enemy aeroplanes and set fire to a hangar by machine-gun fire. In addition to above this officer has destroyed four aeroplanes and driven three down out of control.