133rd (Parachute) Field Ambulance involved in was Operation Slapstick, a landing at the port of Taranto during the Allied invasion of Italy in September 1943. Slapstick was in part a deception operation, to divert German forces away from the main Allied landings at Salerno (Operation Avalanche), which would be taking place on the same day and also an attempt to seize intact the ports of Taranto and Brindisi. The main advantage of Tranato was its large port. Positioned on the eastern side of the country, together with the expected capture of Naples in the west by the Americans, it would give the Allies two
Operation Avalanche tie down German forces, keeping them away from the planned invasion of Normandy – Operation Overlord. However, General George Marshall and much of the American staff wanted to undertake no operations that might delay the Normandy invasion. When it became clear that Operation Overlord could not be undertaken in 1943, it was agreed forces in North Africa should be used to invade Sicily, with no commitment made to any follow-up operations. Joint Allied Forces Headquarters AFHQ were operationally responsible for all Allied land forces in the Mediterranean theatre and it was they who planned and commanded the invasion of Sicily