Nunney was one of the seven Canadians to be awarded the Victoria Cross for their actions on one single day, 2 September 1918, for actions across the 30 km long Drocourt-Quéant Line near Arras, France. The other six were Bellenden Hutcheson, Arthur George Knight, William Henry Metcalf, Cyrus Wesley Peck, Walter Leigh Rayfield and John Francis Young.