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
Operation Hornbill (World War Two) by Hedleys Folboat section for army testing, were found to be extremely unstable in any but flat water and also infringed Hoehn's patent. ‘Special Operations Executive’ (SOE), the British clandestine warfare agency, was behind Ivan Lyon’s scheme, but because of the shortage of required submarines to help reconnoiter and deploy the small craft, and the growing complexity of the plan, the project was eventually shelved. Operation Hornbill (World War Two) Operation Hornbill was a proposed commando operation by Australian forces during World War Two. It was proposed by Ivan Lyons following the success of Operation Jaywick. A precursor to Operation