Allied invasion of Italy Allied invasion of Italy The Allied invasion of Italy was the Allied amphibious landing on mainland Italy that took place on 3 September 1943 during the early stages of the Italian Campaign of World War II. The operation was undertaken by General Sir Harold Alexander's 15th Army Group (comprising General Mark W. Clark's Fifth Army and General Bernard Montgomery's British Eighth Army) and followed the successful invasion of Sicily. The main invasion force landed around Salerno on 9 September on the western coast in Operation Avalanche, while two supporting operations took place in Calabria (Operation Baytown) and Taranto (Operation Slapstick).
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