Potsdam Declaration   Here some quotation from the Official Gazette of the control council for Germany Documents relating to the establishment of the Allied Control Authority  published by the Allied Secretariat in Berlin Elssholzstrase   Under item VI Statement by the Governments of the United Kingdom the United States of America and the Union of Soviet Socialist Republic and the Provisional Government of the French Republic on the zones of occupation in Germany they write   Germany within her frontiers as they were on st December  will for purposes of occupation be divided into four zones one to be alloted to each Power as follows   Under item  VIII Report on the Tripartite Conference of Berlin and there Article IX concerning the western frontier of Poland they write  The three Heads of Government reaffirm their opinion that the final delimitation of the western frontier of Poland should await the peace settlement  Until this peace conference the disputed territories shall be under the administration of the Polish State and for such purposes should not be considered as part of the Soviet Zone of occupation in Germany  So keeping in mind this facts sincerely its obvious that the West Allies didnt order any transfer of Germans out of their ancestral homelands because by doing this they would have created a fait accompli   Actually Russia and Poland created such accomplished facts by expelling most of that Germans  even quite long before the Potsdam Declaration   Comment Any forced transfer of population is a crime against humanity and this it was already at times of   NaziGermany was trialed exactly for such crimes too