From 1940, when Italy entered the Second World War on the side of Germany, Leros suffered bombing raids by the British, including Port Laki, on 26 November 1940, by the Royal Navy (Fleet Air Arm) - Swordfish aircraft of 815 and 819 Squadrons, operating from HMS Illustrious. As a result of the excellent anchorage provided to warships by the many natural coves, the island was the second most bombed during World War Two (after Crete). On 8 September 1943, as Italy could not continue the war on the German side, it signed an armistice and came over to the Allied camp. After the Italian armistice, British reinforcements arrived on Leros and other Dodecanese islands and the island suffered continuous German aerial bombardment. One of the largest attacks was on the Greek Navy's flagship, the , sunk by German bombers on Sunday September 26, 1943, along with , while they were anchored in Portolago. The island of Leros was finally captured by German troops during Operation Taifun in airborne and amphibious assaults between 12–16 November 1943. The forces involved were paratroop units and a battalion from the elite Brandenburg division. The ground troops were supported by bombers of the "Luftwaffe". Among them I. and II. group of Stuka-Wing 3. I. Group operated from Megara Air Base. The island remained under German occupation until the end of the war.