The city also endured heavy Allied and Soviet air raids . Those who survived and could not escape had to face the Soviet Army , which captured the heavily damaged city on 30 March 1945 , followed by large-scale rape and looting . In line with the decisions made by the Allies at the Yalta and Potsdam conferences , the city was annexed by Poland . The remaining German residents of the city who had survived the war fled or were forcibly expelled from their home city to postwar Germany , and the city was repopulated by ethnic Poles ; up to 18 percent ( 1948 ) of them had been deported by the Soviets in two major waves from Polish areas annexed by the Soviet Union , i.e. from the eastern portion of pre-war Poland
Potsdam
Potsdam Conference
Gdańsk