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).
Operation Jupiter (Norway) attention away from the preparations for Operation Torch, the invasion of north Africa, by creating the impression that troops based in Scotland were preparing to invade Norway. Operation Jupiter (Norway) Operation Jupiter was the code name for a plan originating in 1941 for an invasion of northern Norway and Finland by Allied forces during the Second World War. The first versions of the plan were code named Operation Dynamite, Operation Ajax and Operation Marrow. Devised and vigorously promoted by Sir Winston Churchill, the Prime Minister of the United Kingdom, the plan was opposed by all the senior British and Allied