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
Lake Glubokoye (Karelian Isthmus) Lake Glubokoye (Karelian Isthmus) Lake Glubokoye (, lit. "Deep Lake"; ) is a lake on Karelian Isthmus, in Vyborgsky District of Leningrad Oblast. The nearby larger settlements are Kirillovskoye (18 km) and Baryshevo (38 km). The area of the lake is , and the area of its drainage basin is . The lake is connected by an unnamed channel with Lake Bolshoye Rakovoye, located several kilometers northeast. In its turn, Lake Bolshoye Rakovoye is the source of the Bulatnaya River, which flows into the southern branch of the Vuoksi River. The whole system belongs to the basin of Lake Ladoga