Operation Corkscrew was the Allied invasion of the Italian island of Pantelleria (between Sicily and Tunisia) on 11 June 1943 during the Second World War. There had been an early plan to occupy the island in late 1940 (Operation Workshop), but this was aborted when the Luftwaffe strengthened the Axis air threat in the region.The Allied focus returned to Pantelleria in early 1943. The radar installations and airfield on the island were seen as a real threat to the planned invasion of Sicily.