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 Germany transferred four MAL-type ferries - "M-31", "M-32", "M-33" and "M-34" - originally intended for use on Lake Peipus, to the Finns on Ladoga. The Finnish Navy also transferred several small run-down naval vessels to the lake, the motor torpedo boats "Syöksy", and "Vinha", which were no longer in adequate condition to carry torpedoes. Lake remained mostly quiet until Soviet offensive of 1944 started. While Finnish naval forces on the lake remained passive during the Soviet landings at Tuloksa on 23 June they did play key role in facilitating the Finnish evacuations from the eastern shore of the lake Ladoga.