Battle of Porkuni (Estonian: Porkuni lahing) was the largest engagement between Estonians serving in the Red Army and Estonian pro-independence and Waffen-SS units. It took place in 21 September 1944 between Lake Porkuni and the Sauvälja village about seven kilometres northeast of the town of Tamsalu[3] during the Leningrad Front's Tallinn Offensive Operation (17 September 1944 – 26 September 1944).