In addition to strategic missions, squadron operations included attacks on transportation, airfields, and fortifications prior to the Normandy invasion. On D-Day the 612th attacked Normandy beachhead areas dropping bombs five minutes before troops landed. The following month it provided close air support for the breakthrough at Saint-Lô, it also supported the siege of Brest in August and Operation Market Garden in September. During the Battle of the Bulge in December 1944 and January 1945, the unit attacked transportation and communications in the battle area. It supported airborne forces involved in Operation Varsity in March 1945.