IX TCC delivered both the 82nd Airborne and 101st Airborne Divisions in the American airborne landings in Normandy on 6–7 June 1944. In August the command was assigned to the First Allied Airborne Army, which from 17–25 September 1944, landed both American divisions, the British 1st Airborne Division, and the Polish 1st Independent Parachute Brigade in the Netherlands during Operation Market Garden. The 50th TCW moved to bases in France in September as well.