William entered the war in France on 13th January 1915. He joined the 141st Field Ambulance for duty on 5th February 1918. He attended a course at the First Army R.A.M.C. School of Instruction, rejoining the unit on 24th August 1918. On 10th September 1918 he was admitted to the unit�s hospital 'sick', and evacuated to the Line of Communication.