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 Ladoga Naval Detachment of the vessels were later integrated in the Soviet Ladoga flotilla. Listing (not necessarily exhaustive) of wartime vessels and their armament When Finnish forces in the Continuation War reached lake Ladoga in 1941, they found the Soviets had evacuated nearly every serviceable vessel to the southern shore of the lake. On 22 September 1941 the Finns captured a Soviet transport vessel (formerly Latvian coastal transport "Ilga") which was pressed into service as the transport vessel "Aunus". Other vessels available were small armed fishing boats, like 15 ton "Kukkapää". Initial Finnish naval assets however consisted of small motor boats which had