The Oder–Neisse line (Polish: granica na Odrze i Nysie Łużyckiej, German: Oder-Neiße-Grenze) is the border between Germany and Poland which was drawn in the aftermath of World War II. The line is formed primarily by the Oder and Lusatian Neisse rivers, and meets the Baltic Sea west of the seaport cities of Szczecin (German: Stettin) and Świnoujście (Swinemünde). All pre-war German territory east of the line and within the 1937 German boundaries (23.8% of the former Weimar Republic lands, most of them from Prussia) were discussed at the Potsdam Conference, and were placed under International Law Administrative status of Poland (for most of the area) and the Soviet Union (northern East Prussia) after the war (pending the final World War II peace treaty for Germany), and the vast majority of its native German population was killed, fled or expelled by force.