He was a member of the 16th Battalion, Canadian Infantry (Manitoba Regiment), when he was killed on April 30, 1916. According to the CEF burial register he was killed in action at Bedford House south of Ypres. He was the son of John Edward and Margaret Johnston, of Mimico, Ontario.
His brother David Johnston also enlisted but survived the war only to die in an accident on the way home.
courtesy of the Canadian Virtual War Memorial
Canadian Virtual War Memorial