this area, where the front line had been virtually unchanged since September 1941, and hoping to repel the Soviet offensive. Soviet preparations The plan for Operation Iskra was approved in December. With the combined efforts of the Volkhov and Leningrad Fronts, defeat the enemy in the area of Lipka, Gaitolovo, Dubrovka, Shlisselburg, and thus penetrate the Leningrad blockade. Finish the operation by the end of January 1943. This meant recapturing the "bottleneck" and opening a corridor to Leningrad. After that, the two fronts were to rest for 10 days and resume the offensive southward in further operations. The biggest difference from the earlier Sinyavino Offensive was the location of the main attack. In September 1942 the Soviet forces were attacking south of the town of Siniavino, which allowed them to potentially encircle several German divisions, but also left the army open to flanking attacks from the north, and it was this which ultimately caused the offensive to fail. In January 1943 the offensive was conducted north of Siniavino, closer to the Ladoga Lake shore, which removed the threat of flanking attacks and increased the probability of success, but forced the Soviets to abandon the idea of encircling most of the German forces in the "bottleneck". The offensive was to be conducted by Leningrad Front's 67th Army and Volkhov Front's 2nd Shock Army commanded by Major General M.P. Dukhanov and Lieutenant General V.Z. Romanovsky respectively. The 8th Army, commanded by Lieutenant General F.N. Starikov, was to conduct a limited offensive on the 2nd Shock Army's flank and defend elsewhere. 13th and 14th Air Armies provided air support. The two fronts spent December training and preparing for the offensive, and received significant reinforcements. These included not just replenishment and additional rifle divisions and brigades, but also significant additional artillery and engineer units, which were vital for breaching the heavy German defenses. Specialized winter units included three ski brigades and four aerosani battalions. To ensure the Soviet forces had air superiority, which they had lacked in the previous offensive, the air strength in the area was increased to a total of over 800 planes, predominantly fighters. Large tank forces could not operate well in the swampy terrain, so the tank forces were used primarily as battalions reinforcing divisions or slightly larger brigades, which were to operate independently. Originally the operation was due to begin on 1 January, but poor ice conditions on the