Operation Avalanche Operation Avalanche Operation Avalanche was the codename for the Allied landings near the port of Salerno, executed on 9 September 1943, part of the Allied invasion of Italy. The Italians withdrew from the war the day before the invasion, but the Allies landed in an area defended by German troops. Planned under the name "Top Hat", it was supported by the deception plan Operation Boardman. The landings were carried out by the US Fifth Army, under American General Mark W. Clark. It comprised the U.S. VI Corps, the British X Corps and the US 82nd Airborne Division, a total of
Allied Force Headquarters Allied Force Headquarters Allied Force Headquarters (AFHQ) was the headquarters that controlled all Allied operational forces in the Mediterranean Theatre of World War II from late 1942 until the end of the war in Europe in May 1945. AFHQ was established in the United Kingdom in August 1942 under Lieutenant General Dwight David Eisenhower in order to command the forces committed to Operation Torch, the Allied invasion of French North Africa, set for November. Eisenhower had the title Commander-in-Chief, Allied Expeditionary Force. Shortly after the establishment of the headquarters, "Expeditionary" was deleted from its title, for reasons of operational security.