sentences:  After the war, he wrote the screenplay for the 1949 film, "Twelve O'Clock High".Aided ground forces in Normandy on D-Day, 6 June 1944.The 487th Bomb Group attacked German troops and artillery positions to assist British forces near Caen in July; struck gun emplacements to support the Allied effort at Brest in August and to cover the airborne attack on the Netherlands in September 1944.