In June 1944, the group was diverted from its strategic mission to prepare for Operation Overlord, the invasion of France. On D Day, it attacked coastal defenses on the Cherbourg Peninsula. For the remainder of the month it was engaged in air interdiction, striking airfields, rail systems and roads and depots behind enemy lines. The group was also diverted to tactical targets for shorter periods. In July 1944, it supported Operation Cobra the breakout of ground forces at Saint Lo. During Operation Market Garden, the attempt to secure bridgeheads across the Rhine River in the Netherlands, it supported the British 1st Airborne Division. It provided similar support during the Battle of the Bulge in December 1944 and January 1945, and Operation Varsity, the airborne assault across the Rhine in March 1945.