When the buildup for Operation Overlord got under way, an increasing need for transport and airborne assault squadrons became apparent. Therefore, personnel and aircraft from No. 298 Squadron RAF at RAF Tarrant Rushton were formed into No. 644 Squadron on 23 February 1944 as part of No. 38 Group RAF. Operations also included supply dropping to SOE forces and glider towing during the operations Overlord, Market Garden and Varsity. They also carried out supply drops over Norway and even some tactical night-bombing missions towards the end of the war.