Bütow was captured by the Soviet Red Army on 8 March 1945 . Some inhabitants had fled before the Soviet advance . In 1945 , after the end of the war , the town was put under Polish administration according to the Potsdam Conference and renamed to the Polish '' Bytów '' . Those German inhabitants , which had remained in the town or had returned to it short after the war , were later on expelled and replaced with ( 1947 Akcija Wisla ) Ukrainians ==== ( 1947 Akcija Wisla ) === 141,000 civilians residing around Bieszczady and Low Beskids were forcibly resettled to formerly German territories , ceded to Poland at the Yalta Conference at the end of World War II
Potsdam Conference
Potsdam Conference
Bytów