Operation Iskra (), a Soviet military operation in January 1943 during World War II, aimed to break the Wehrmacht's siege of Leningrad. Planning for the operation began shortly after the failure of the Sinyavino Offensive. The German defeat in the Battle of Stalingrad in late 1942 had weakened the German front. By January 1943, Soviet forces were planning or conducting offensive operations across the entire German-Soviet Front, especially in southern Russia; Iskra formed the northern part of the wider Soviet 1942–1943 winter counteroffensive. The operation was conducted by the Red Army's Leningrad Front, Volkhov Front, and the Baltic Fleet from 12 to 30 January 1943 with the aim of creating a land connection to Leningrad. Soviet forces linked up on 18 January, and by 22 January, the front line had stabilised. The operation successfully opened a land corridor wide to the city. A railroad was swiftly built through the corridor and allowed more supplies to reach the city than the Road of Life, across the frozen surface of Lake Ladoga, which significantly reduced the possibilities of the capture of the city and of any German–Finnish linkup. The success led to Operation Polyarnaya Zvezda less than two weeks later, which aimed to decisively defeat Army Group North and to lift the siege altogether. Polyarnaya Zvezda failed by achieving only minimal progress. Soviet forces made several other attempts in 1943 to renew their offensive and to lift the siege completely, but they made only modest gains in each one. The corridor remained within range of German artillery, and the Red Army did not finally lift the siege until a year later, on 27 January 1944. Background The siege of Leningrad started in early autumn 1941. By 8 September 1941, German and Finnish forces had surrounded the city, cutting off all supply routes to Leningrad and its suburbs. However, the original drive on the city failed and the city was subjected to a siege. During 1942 several attempts were made to breach the blockade but all failed. The last such attempt was the Sinyavino Offensive. After the defeat of the Sinyavino Offensive, the front line returned to what it was before the offensive and again separated Leonid Govorov's Leningrad Front in the city from Kirill Meretskov's Volkhov Front. Despite the failures of earlier operations, lifting the siege of Leningrad was a very high priority, so new offensive preparations began in November 1942. In