[1] On 13 August 1917, young MacLeod was commissioned a temporary second lieutenant on probation in the Royal Flying Corps.
On 30 August at 1730 hours, he scored his first aerial victory, driving a Fokker D.VII down out of control southwest of Armentières, France.
[3] MacLeod was awarded both a Distinguished Flying Cross and the Belgian Croix de Guerre for his valour.
[3] MacLeod was transferred to the unemployed list of the Royal Air Force on 12 March 1919, effectively ending his term of military service.
[3] Malcolm Plaw MacLeod died at Sunnybrook Hospital in Toronto on 22 February 1960, and was buried at Mount Pleasant Cemetery.