Private Harry McFaden Annan left for overseas with the 21st. Battalion April 22nd, 1917, on the “S.S. Olympic”, and trained at West Sandling until June 26th, 1917, when he proceeded to France with reinforcements for the 20th. Battalion. After eight months continuous service, during which time he took part in the engagements at Hill 70 and Passchendale, and while on leave to Scotland, he suffered with pleurisy, was admitted to hospital, and invalided to Canada, leaving England June 26th, 1918, and arriving at London, Ontario, July 14th, 1918.
Private Harry McFaden Annan received his discharged from the C.E.P. August 20th, 1918; was taken on the strength of the Invalided Soldiers Commission for treatment at London, Ontario, and on completion of treatment was discharged from the I.S.C. December 15th, 1918. Cause for discharge… Medically unfit for further military service.