After three years of bombing raids over German naval bases and industrial sites in occupied territories, the RCAF joined the critical mission of supporting the D-Day Invasion on 6 June 1944. Bombers of No. 6 Group dropped over 870 tons of bombs on gun positions overlooking the beaches of Normandy, and fighter wings dive-bombed enemy strongholds and guarded the Allied landings.

During the bitter fighting which followed around Caen, the RCAF gave air support to Canadian and British forces, and when enemy troops were caught in the Falaise pocket, Spitfires and Typhoons attacked the long columns of vehicles with deadly machine-gun fire. Outstanding exploits were performed by RCAF pilots as they drove the German Air Force from the sky and prepared the way for advancing armies.