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 relations uncovered in spring 2013, and the Finnish Security Intelligence Service (Supo) was investigating the breach. Finland–Russia relations Finno–Russian relations have been conducted over many centuries, from between Sweden and Russia in 1700s, to the planned and realized creation and annexation of the Grand Duchy of Finland within the Russian Empire during Napoleonic times in 1800s, to the dissolution of the personal union between Russia and Finland after the abdication of Russia's last czar in 1917, and subsequent birth of modern Finland, with support of the bolshevik (Soviet) Russian government. Finland had its own civil war with minor involvement by Soviet