Germany–Poland border Germany–Poland border The Germany–Poland border (, ), the state border between Poland and Germany, is currently the Oder–Neisse line. It has a total length of and has been in place since 1945. It stretches from the Baltic Sea in the north to the Czech Republic in the south. Nevertheless, the border has not always followed this line, and it has a long and often volatile history. The Germany–Poland border traces its origins to the beginnings of the Polish state, with the Oder (Odra) and Neisse (Nysa) rivers (the Oder–Neisse Line) being one of the earliest natural boundaries between Germany and
Finland–Russia border most of which were Savonians. After the Finnish War, the Treaty of Fredrikshamn converted all of Finland from Swedish territory to a Russian possession, the Grand Duchy of Finland. The Finnish–Russian border was moved back to the pre-1721 location, so that the Grand Duchy gained the so-called "Old Finland", territories previously held by Sweden, in 1812. After Finland became independent in 1917, there was the Finnish Civil War in 1918, and even after this war, the Russian Civil War continued. Finnish activists often crossed the border into Soviet territory in order to fight in the "heimosodat", wars aiming at Finnish