After World War I , Ratibor was incorporated in the Prussian Province of Upper Silesia , it became a border town after the Upper Silesia plebiscite in 1921 . During World War II , it was initially spared by the Red Army Vistula – Oder Offensive but occupied and devastated on 30 March 1945 . After end of the war , in June 1945 , the army of Czechoslovakia briefly entered into the town and Czechoslovakia officially claimed the area of Racibórz and Głubczyce ( '' Ratibořsko '' and '' Hlubčicko '' ) because of having a substantial Czech minority ( see border conflicts between Poland and Czechoslovakia ) . At the same time the expulsion of Germans started , while the town became wholly part of Poland as defined at the Potsdam Conference . The German CDU politician Herbert Hupka at the end of his life promoted reconciliation between the former German inhabitants , including himself , and the new Polish settlers and administration of Racibórz . In 1997 , a flood devastated the town
Potsdam Conference
Potsdam Conference
Racibórz