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–Sweden relations the power of each. At peak, the Swedes invaded Poland once, known as the Swedish Deluge, which later had razed much of Poland after serious destructions by the Swedish invaders. At 18th century, the partitions of Poland was the main hot detail in Sweden awake of the fear being partitioned by Russia, but after Russo–Swedish war ended in 1790, successful diplomatic missions from Sweden had finally prevented Sweden from suffering the same fate like Poland. Sweden was the main destination for many immigrants from partitioned Poland. During both World War I and World War II, the Polish community in Sweden