Operation Avalanche Operation Avalanche Operation Avalanche was the codename for the Allied landings near the port of Salerno, executed on 9 September 1943, part of the Allied invasion of Italy. The Italians withdrew from the war the day before the invasion, but the Allies landed in an area defended by German troops. Planned under the name "Top Hat", it was supported by the deception plan Operation Boardman. The landings were carried out by the US Fifth Army, under American General Mark W. Clark. It comprised the U.S. VI Corps, the British X Corps and the US 82nd Airborne Division, a total of
Douglas MacArthur in World War II MacArthur created two new commands, AFMIDPAC under Lieutenant General Robert C. Richardson, Jr., and AFWESPAC under Lieutenant General Wilhelm D. Styer, which absorbed USASOS and USAFFE. This reorganization, which took some months to actually accomplish, was part of preparations for Operation Downfall, the invasion of Japan. The first phase, the invasion of Kyushu, known as Operation Olympic, was scheduled to commence on November 1, 1945. The invasion was pre-empted by the surrender of Japan in August 1945. On September 2, MacArthur accepted the formal Japanese surrender aboard , thus ending hostilities in World War II. In recognition of his role