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).
World War II by country Queen of Tonga, Salote Tupou III, put her island country's resources at the disposal of Britain and was a loyal supporter of the Allied cause throughout the war. The Emirate of Transjordan was a British mandate territory, and the Transjordanian forces were under British command during the war. See Caribbean Islands. See North African Campaign. Turkey was neutral until several months before the end of the war, at which point it joined the Allied powers. Prior to the outbreak of war, Turkey signed a Mutual Aid Pact with France and Britain in 1939. After the German invasion of France, however,