The Sinyavino offensives were a series of Soviet offensives in 1941–1943 during World War II around the Sinyavino Heights, east of Leningrad, to lift the Siege of Leningrad.
The first Sinyavino offensive was a Soviet counterattack during the German Encirclement of Leningrad between 10 and 26 September 1941.
It was executed by the 54th Army which attacked from the east and by the Leningrad Front's 115th Rifle Division and 4th Marines Brigade which attacked from the region of Nevskaya Dubrovka in Leningrad.
Both attacks were unsuccessful, but significantly complicated the German Tikhvin offensive, which occurred at the same time.
The fourth Sinyavino offensive, better known as Operation Iskra , was a successful Soviet offensive in January 1943 that conquered the territory north of Sinyavino and opened up a corridor between the besieged city of Leningrad and the rest of the Soviet Union.