Mainwaring has no combat experience, which causes tension with the other members of the Home Guard, particularly Wilson, who was a decorated Captain in the Royal Artillery (Mons, Gallipoli) during the First World War. Mainwaring did, however, serve in the Army of Occupation in France, "during the whole of 1919 — somebody had to clear up the mess." He volunteered to enlist in 1914 but was rejected with poor eyesight. (During the Second World War, John Le Mesurier, who played Wilson, had been a captain while Arthur Lowe was a Sergeant Major. Lowe tried to enlist in the Merchant Navy prior to the Second World War but was also rejected with poor eyesight.)