Use the map to compare the post-WWII borders with those of the Treaty of Versailles. What are the reasons for the change?
The territories of Germany transferred by the decision of the Postdam Conference (17.07.1945 -02.08.1945):
USSR received Kaliningrad
Poland’s borders expanded almost to Berlin
These new borders were confirmed by the agreements between Poland and the GDR dated 06.07.1950; USSR and GDR from 12.07.1964; USSR and FRG from 07/12/1970; Poland and Germany from 07.12.1970
Transcarpathian Ukraine received the city of Uzhgorod, reunited with the Ukrainian SSR under an agreement between the USSR and Czechoslovakia of 07/29/1943.
A small territory of the Byelorussian SSR passed to Poland under an agreement between the USSR and Poland of 08.16.1945.
The Petsamo (Pechenga) region was returned to the USSR under an agreement with Finland dated 02/10/1947
Territories seceded from Italy to Yugoslavia under the Treaty of Paris on 10.02.1947 southern part of Trieste
Territories seceded from Italy to Greece under the Treaty of Paris dated 10.02.1947; Dodecanese islands.