In Germany the connotation was also sometimes linked to the pre-war German provinces east of the Oder-Neisse line which were lost as the result of World War II , annexed by People 's Republic of Poland and the Soviet Union , and ethnically cleansed of Germans by communist authorities and forces ( '' see expulsion of Germans after World War II '' ) due to Yalta Conference and Potsdam Conference decisions . In this view Bohemia and Moravia , with its dual Western Slavic and Germanic heritage , combined with the historical element of the " Sudetenland " , is a core region illustrating the problems and features of the entire Central European region
Yalta Conference
Yalta Conference
Central Europe