The losses left the Axis air forces in a depleted state. They could not offer the air support needed at the frontline. The situation on the island was still stringent going into November, but Park's victory in the air battle was soon followed by news of a major success at the front. At El Alamein in North Africa the British had broken through on land, and by 5 November were advancing rapidly westward. News soon reached Malta of Operation Torch, the Allied landing in Vichy French Morocco and French Algeria on 8 November. Some 11 days later, news of the Soviet counterattack during the Battle of Stalingrad increased morale even more. The extent to which the success in North Africa benefited Malta was apparent when a convoy (Operation Stoneage) reached Malta from Alexandria on 20 November virtually unscathed. This convoy is seen as the end of the two-year siege of Malta. On 6 December, another supply convoy under the codename Operation Portcullis reached Malta without suffering any losses. After that, ships sailed to Malta without joining convoys. The capture of North African airfields and the bonus of having air protection all the way to the island enabled the ships to deliver 35,000 tons. In early December, another 55,000 tons arrived. The last air raid over Malta occurred on 20 July 1943. It was the 3,340th alert since 11 June 1940.