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
Staraya Ladoga Ulfsson, to rule the town. This information is confirmed by sagas and archaeological evidence, which suggests that Ladoga gradually evolved into a primarily Varangian settlement. At least two Swedish kings spent their youths in Ladoga, king Stenkil and Inge I, and possibly also king Anund Gårdske. In the 12th and 13th centuries, Ladoga functioned as a trade outpost of the powerful Novgorod Republic. Later its trade significance declined and most of the population engaged in fishing in the 15th century. After new fortresses such as Oreshek and Korela were constructed in the 14th century further to the west of Ladoga,