 By now Clisby had become known for his extreme aggression in the air, rushing headlong into combat irrespective of the odds and often alone.On 12 May, he was credited with the destruction of six aircraft, claiming three Bf 109s and three Henschel Hs 126 reconnaissance planes (also identified as Arados) during action in support of Fairey Battles in their historic raid on the Albert Canal bridges near Maastricht, on the Dutch-Belgian border.For his achievements that day, as well as his earlier successes, Clisby was awarded the Distinguished Flying Cross (DFC).