Finland–Sweden border border continues south into the northern Baltic Sea to a point where it meets the zone border of Estonia. The tripoint between the economic zones is defined by a treaty signed in 2001. The Finnish–Swedish border was created in 1809 by the Treaty of Fredrikshamn, as Sweden ceded Finland over to Russia. The course of the border was described in the fifth article of the treaty, without great detail. The borders were agreed to be the Sea of Åland, the Gulf of Bothnia, and the rivers Tornionjoki and Muonionjoki. Islands in the sea belonged to whichever country was the nearest
Finland–Russia border In 1947, Finnish trains were allowed to pass through the base, but the passenger car windows were blinded and locomotive replaced while crossing through. Earlier between 1940–41, Soviet Union had rented Hanko Peninsula as a military base. Apparently there was also a border crossing to the exclave at the time. In 2015, 9.1 million individuals crossed the border, half of which through Vaalimaa and Nuijamaa. Finland is the country that issues the most Schengen visas to Russians. On 26 November 1939, the Soviet Union's Red Army shelled the Russian village of Mainila, and blamed Finland. The Soviets used this false