Having served 3 years with King Edward's Horse, Medley Kingdon Parlee, a student, joined the Canadian Infantry Battalion in October 1914. The son of Agnes Louise (White) and Rev. Henry Thomas Parlee, he married Kathleen DeWolfe Rathbun on 13 February 1915. He was seconded for service with the Royal Flying Corps on 6 November 1916 as a temporary Lieutenant. Posted to 22 Squadron as an observer, he scored 6 victories flying the F.E.2b in 1917. He ceased to be seconded for duty with the Royal Air Force on 31 March 1919.