 The 4 FG flew interdiction and counter-air missions during the invasion of Normandy in June 1944 and supported the airborne invasion of the Netherlands in September.They participated in the Battle of the Bulge, December 1944 – January 1945, and provided cover for the airborne assault across the Rhine in March 1945.The 4th Fighter Group was inactivated at Camp Kilmer, New Jersey, on 10 November 1945.