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
Poland–Russia border Poland–Russia border The modern Poland–Russia border is a nearly straight-line division between the Republic of Poland (European Union (EU) member) and the Russian Federation (CIS member) exclave of Kaliningrad Oblast, a region not connected to the Russian mainland. It is currently long. Its current location and size were decided as part of the aftermath of World War II. In 2004 it became part of the boundary of the European Union and Commonwealth of Independent States. The history of the border between Poland and Russia can be traced to the early history of both nations, with one of the earliest notable