Lake Ladoga Stolbovo, the northern and western coast was ceded by Russia to Sweden. In 1721, after the Great Northern War, it was restitution to Russia by the Treaty of Nystad. Later, in 1812–1940 the lake was shared between Finland and Russia. According to the conditions of the 1920 Tartu Peace Treaty militarization of the lake was severely restricted. However, both Soviet Russia and Finland had flotillas in Ladoga (see also Finnish Ladoga Naval Detachment). After the Winter War (1939–40) according to the Moscow Peace Treaty, Ladoga, previously shared with Finland, became an internal basin of the Soviet Union. During the Continuation
Finnish reconquest of Ladoga Karelia (1941) his forces further and the 1st Jaegar Brigade finished its 110 km long contested advance when it reached the shore of lake Ladoga at Koirinoja the next day. This also severed the connections between the Soviet forces in the area. While Talvela continued his advance both further east along the shore of the Lake Ladoga as well as further inland the Soviets had reorganized some of their forces and were rushing reinforcements to the east shore of Lake Ladoga. Soviet 452nd Motorized Infantry Regiment set up defensive positions around the town of Salmi; however advancing Finnish forces encircled the defenders