Transferred to Fifteenth Air Force in December 1943 and engaged in bombing operations primarily in Italy in support of the Allied drive north toward Rome, Jan-Jun 1944; the Invasion of southern France, Aug 1944; and the campaigns against German forces in northern Italy, Jun 1944-May 1945. Engaged primarily in long-range bombardment of strategic targets after Oct 1943, attacking oil refineries, aircraft factories, steel plants, and other objectives in Germany, Poland, Czechoslovakia, Austria, Hungary, Yugoslavia, Romania, and Greece.