sentences:  The full title of the treaty is "Treaty between the Federal Republic of Germany and the Republic of Poland on the confirmation of the frontier between them, 14 November 1990" ("Vertrag zwischen der Bundesrepublik Deutschland und der Republik Polen über die Bestätigung der zwischen ihnen bestehenden Grenze" in German, and "Traktat między Rzeczpospolitą Polską a Republiką Federalną Niemiec o potwierdzeniu istniejącej między nimi granicy" in Polish, the order of the countries being reversed in the Polish text).In the Potsdam Agreement of 1945, the Allies of World War II had defined the Oder–Neisse line as the line of demarcation between the Soviet occupation zone in Germany and Poland, pending the final determination of Poland's western frontier in a later peace settlement.This transferred extensive regions to Poland, some of which had been under German control for centuries, reducing Germany to approximately three quarters of the territory as of 1937.