Before 1 June 1945, some 400,000 people crossed back over the Oder and Neisse rivers eastward, before Soviet and Polish communist authorities closed the river crossings; another 800,000 entered Silesia through Czechoslovakia.
Before 1 June 1945, some 400,000 people crossed back over the Oder and Neisse rivers eastward, before Soviet and Polish communist authorities closed the river crossings; another 800,000 entered Silesia from Czechoslovakia.-->После окончательной победы армий стран союзников Потсдамская конференция, на которой произошла встреча лидеров СССР, США и Великобритании, фактически узаконила депортацию.