Montague lived in Nottingham and enlisted on 24th October 1915. The citation for his Distinguished Conduct Medal reads "For conspicuous gallantry and devotion to duty during a heavy hostile shelling of his battery. He displayed the utmost promptness and gallantry in attending wounded men, taking two of them to a dressing station a mile away under heavy shell and gas fire. On another similar occasion he was again conspicuous in moving two wounded men to a place of safety under heavy shell fire, and, in fact, on numerous occasions he has displayed exceptional gallantry and devotion in going into battery positions which were being heavily shelled to attend to wounded men."