The decision to invade Sicily was agreed by the Western Allies at the Casablanca Conference in January 1943. 'Operation Husky' was to be a combined amphibious and airborne attack scheduled for that summer under the supreme command of General Dwight D. Eisenhower.
The Allies began air attacks on targets in Sicily and Italy in the early summer of 1943. They also attacked the Italian island of Pantellaria, which surrendered to the British 1st Division who arrived there on 11 June.
The Allied convoys concentrated near Malta on the 9 July and headed for Sicily's southern beaches. The careful planning of the landings was slightly hindered by a storm, which slowed down the landing craft. The Italian defenders believed such weather conditions would deter any attempt of an invasion and were on a low state of alert.