Operation Avalanche and the Italian mainland. The Allied invasion of Sicily in July 1943, codenamed Operation Husky, was highly successful, although many of the Axis forces there were allowed to avoid capture and escape to the mainland. More importantly a "coup" deposed Benito Mussolini as head of the Italian government, which then began approaching the Allies to make peace. It was believed a quick invasion of Italy might hasten an Italian surrender and produce quick military victories over the German troops that would now be trapped fighting in a hostile country. However, Italian (and more so German) resistance proved relatively strong, and
Allied invasion of Italy 8 September. With such short notice to create plans, Operation Slapstick was soon nicknamed Operation Bedlam. The Avalanche plan using less than half the troops landed during Operation Husky was daring, considering possible resistance by six German divisions. The Fifth Army would be landing on a very broad front, using only three assault divisions (one American, the 36th, under Major General Fred L. Walker, in VI Corps, and two British, the 46th, under Major-General John Hawkesworth, and 56th, under Major-General Douglas Graham, in X Corps), and the two corps were widely separated, both in distance () and by the Sele