Operation Iskra (Russian: операция Искра, lit. 'Operation Spark'), 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.