||The Treaty of Versailles ceded the German territory of Poznania and Western Prussia to the newly independent Poland. This allowed the Poles to have access to the Baltic Sea. Danzig became a free city administered by the League of Nations. To the south and east of the Corridor, plebiscites were held in Upper Silesia and parts of East Prussia to determine whether the territories should become Polish or German. The Corridor completely cut off East Prussia from the rest of Germany and later became an area of dispute between Poland and Germany.