Expanding its operations to include interdictory and support missions, the group contributed to the Battle of Normandy by bombing gun emplacements and troop concentrations near the beachhead area in June 1944 and aided the Saint-Lô breakout by attacking enemy troop positions on 24 and 25 July 1944. The 91st flew tactical bombing missions on the front line near Caen in August 1944 and attacked communications near the battle area during the Battle of the Bulge in December 1944 and January 1945. In support of Operation "Varsity", the group assisted the push across the Rhine by striking airfields, bridges and railways near the front line in the spring of 1945.