The Sinyavino offensive (or third Sinyavino offensive) was an operation planned by the Soviet Union in the summer of 1942 with the aim of breaking the siege of Leningrad, which had begun the previous summer, to establish a reliable supply line to Leningrad. At the same time, German forces were planning Operation Northern Light () to capture the city and link up with Finnish forces. To achieve that heavy reinforcements were arriving from Sevastopol, which the German forces captured in July 1942. Both sides were unaware of the other's preparations, and this made the battle unfold in an unanticipated manner for both sides.
The Soviet offensive began first in two stages. The Leningrad Front began the offensive on 19 August and the Volkhov Front launched the main offensive on 27 August. From 28 August the German side shifted the forces which were building up for their own offensive to gradually halt the Soviet offensive. Initial German counterattacks failed, but the Soviet forces could not advance either. After a ten-day stalemate, the significantly reinforced Germans launched a counterattack against the Soviet forces on 21 September. After five days of heavy fighting, the German forces linked up and cut off the bulge formed by the Soviet offensive.Glantz p. 224 By 10 October the front line returned to the position before this battle; heavy fighting continued until 15 October, as the last pockets of Soviet resistance were destroyed or broke out.
In the end, the Soviet offensive failed, but heavy casualties caused the Germans to order their forces to assume a defensive stance. In November, the German reinforcements and other units were stripped from Army Group North to deal with the major Soviet offensive at Stalingrad and Operation Northern Light was aborted.Glantz p. 230
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 the winter 1941–42, the city was partially supplied via the Road of Life over the frozen Lake Ladoga, which allowed the defenders to continue holding out. However, after the siege of Sevastopol ended on 4 July 1942, with the German capture of the city, the German 11th Army was free to be used elsewhere, and Hitler decided that the 11th Army would be used in the assault on Leningrad.Isayev p. 133
Soviet forces tried to lift the siege, which was causing severe damage to the city and losses in civilian population. The Road of Life was frequently disabled by regular German airstrikes. Several smaller offensives were launched in 1942 in the region, but failed. The last offensive near Lyuban resulted in the encirclement and destruction of most of the Soviet 2nd Shock Army.Isayev p. 134 Nevertheless, the opening of a supply route to Leningrad was so important that preparations for the new operation began almost immediately after the defeat at Lyuban.Isayev p.135
Preparations The area south of Ladoga is heavily forested with many wetlands (notably peat deposits) close to the lake. This terrain hindered the mobility of artillery and vehicles. In addition the forest shielded both sides from visual observation. One of the key locations were the Sinyavino heights, which were approximately 150 metres higher than the surrounding flat terrain. The heights were one of the few dry and clear areas and provided a good spot for observation. The front line changed very little after the blockade was established, allowing the German forces to build a dense defensive network of strong points in the area, interconnected by trenches, protected by extensive obstacles and interlocking artillery and mortar fire.Glantz pp.216–217
German plans The plan to capture Leningrad in summer-autumn 1942 was first outlined in the OKW (German supreme command) directive 41 of 5 April 1942. The directive stressed that the capture of Leningrad and the drive to the Caucasus in the east were the main objectives in the summer campaign on the Eastern Front.Isayev p. 132
During discussions with Hitler on 30 June, the commander of Army Group North, Field Marshal Georg von Küchler, presented him with several operations that would help to carry out this directive. Following these discussions the OKH (German high command) started redeploying heavy artillery from Sevastopol, including the siege artillery batteries Gustav, Dora and Karl, to assist in destroying Soviet defenses and the Kronshtadt fortress. The redeployment was complete by 23 July. On the same day, Fuehrer Directive No. 45 included orders for an operation by Army Group North to capture Leningrad by early September. This operation was named "Feuerzauber" (Fire Magic). The attack was to be carried out by the forces of the 11th Army, which were free to be used elsewhere after the capture of Sevastopol.Glantz pp. 212–213 In addition, the OKH sent the 8th Air Corps to provide air support for land forces. On 30 July the operation was renamed Operation Northern Light ().
The formulated operation required three army corps to penetrate the Soviet defenses south of Leningrad. One corps would then cut off Leningrad from the troops to the south and west, while the other two would turn east and destroy the Soviet forces between the Neva River and Lake Ladoga. Then the three corps could capture Leningrad without heavy street fighting.Glantz p. 213
This would in turn free up the troops involved in the siege for use elsewhere and would make victory on the Eastern Front more likely. Meanwhile, the Germans were also preparing for the Battle of Stalingrad. The 11th Army had a total of 12 divisions under command in the Leningrad area.
Soviet plans The Soviet Union had tried throughout 1942 to lift the siege. While both the winter and Lyuban offensives operation failed to break the siege of the city, there was now a part of the front where only separated the Leningrad Front in the city and the Volkhov Front.Isayev P.135 The offensive was to link up the forces of the two fronts and establish a supply route to Leningrad. Because the Leningrad Front was at this time weaker, the Volkhov was to carry out the offensive, while the Leningrad Front would only carry out local attacks and capture bridgeheads across the River Neva. The Volkhov Front's 8th Army was to spearhead the attack, with the 4th Guards Rifle Corps in second and the reforming 2nd Shock Army in third echelon.Glantz p.217
Taking into account the difficult and heavily fortified terrain of the upcoming battle, the Soviet troops were, in contrast to their earlier operations, very well equipped. The 8th army was significantly reinforced with artillery and tanks. On average, each first echelon division was reinforced by a tank battalion, a few artillery regiments and one or two batteries of Katyusha rocket launchers. This allowed the Soviets to deploy 60-100 guns and 5-9 tanks per kilometer of frontage of their main offensive. The troops were equipped with large numbers of PPD-40 and PPSh-41 sub-machine guns. Engineering units were attached to individual artillery batteries, increasing the overall mobility of the army.Isayev p. 135Glantz p. 218
Order of battle
German ArmyGlantz p. 216 18th Army (Initial forces on 27 August) 26th Army Corps 223rd Infantry Division 227th Infantry Division 1st Army Corps 96th Infantry Division 28th Army Corps 121st Infantry Division 5th Mountain Division 28th Light Infantry Division 11th Army (Reinforcements arriving from 28 August) 30th Army Corps 170th Infantry Division 24th Infantry Division 132nd Infantry Division 12th Panzer Division 3rd Mountain Division
LuftwaffeBergström 2003, p. 365. Luftwaffenkommando Ost Luftflotte 1 Jagdgeschwader 54 Jagdgeschwader 77
Soviet ArmyIsayev p. 139 8th Army 6th Guards Rifle Corps 128th Rifle Division 3rd Guards Rifle Division 19th Guards Rifle Division 24th Guards Rifle Division 191st Rifle Division 122nd Tank Brigade 4th Guards Rifle Corps 259th Rifle Division 22nd Rifle Brigade 23rd Rifle Brigade 32nd Rifle Brigade 33rd Rifle Brigade 53rd Rifle Brigade 137th Rifle Brigade 140th Rifle Brigade 98th Tank BrigadeGlantz p. 221 2nd Shock Army 327th Rifle Division 6th Rifle Brigade 4th Tank Brigade
Soviet Air Force 14th Air Army
Battle Neither side was aware that the other was building up forces and planning to launch an offensive in the region. The Germans only realized that the Soviet action was a major offensive in the following days after the start of the attack by the 8th Army on 27 August. This resulted in the 11th Army and the 8th Air Corps being reassigned to deal with a major Soviet offensive and abandon preparations for the offensive on Leningrad. Likewise the Soviet forces were unaware of the redeployment of the 11th Army to Leningrad and only expected to face ten divisions of the 18th Army. The redeployment of forces from the Crimea was not detected. This meant that the Soviet forces were launching an offensive when at a numerical disadvantage even before the battle started.
Soviet offensive, Leningrad Front, 19–26 August
Ultimately the Soviet operation started before the German one, on 19 August, although German sources give later dates.Haupt W. Army Group North. The Wehrmacht in Russia 1941–1945 This is because the offensive by the Volkhov Front did not begin until 27 August. The German operation was due to begin on 14 September.Isayev p. 137 The Leningrad Front launched its offensive on 19 August, however due to the limited supplies and manpower, the front was only to capture and expand bridgeheads across the Neva River, that would help it to link up with the Volkhov Front. The German side did not see this as a major offensive, because the Leningrad Front had already mounted several local offensives in July and early August. On 19 August Franz Halder noted in his diary only "local attacks as usual" in the Region. Therefore, no additional defensive measures were taken.Glantz p. 217
Soviet main offensive, Volkhov Front, 27 August – 9 September
The Volkhov Front offensive started on the morning of 27 August. The hidden buildup of forces allowed the Soviet forces to enjoy a significant superiority on the first day of the offensive in manpower, tanks and artillery and caught the Germans by surprise. The 8th Army had initial success advancing and scattering the first line of German defenses such as the 223rd Infantry Division, advancing on the first day at the location of the main attack. However initial attempts to expand on the flanks failed due to heavy German resistance.Glantz p. 219 The German command reacted by redeploying the 5th Mountain and 28th Light Infantry (Jager) divisions from staging areas for Operation Nordlicht to meet the Soviet offensive. Lead elements from the 170th infantry Division, which had only arrived in Mga, have also joined the offensive. In addition Hitler diverted the 3rd Mountain division, which was being redeployed by sea to Finland, to Estonia instead.
On 29 August the breach in the German defenses was up to deep. To sustain their advance towards Sinyavino, the Soviet forces started committing their second echelon divisions into combat. The German forces were further reinforced by the 12th Panzer and part of the 96th Infantry Divisions. Notably, this day saw the first combat deployment of the Tiger tank, as part of the 502nd Tank Battalion, which on 29 August had four Tigers. The attempt to counterattack with them failed as two of the tanks broke down almost immediately, and the third tank's engine overheated.