Kammala jumla mai zuwa: A lokacin Yaƙin Duniya na II, a cikin iyakokin garin na yau, Jamusawa sun kafa kuma sun gudanar da wani sansanin aikin tilas na kurkukun soja na Jamus a Grudziądz a cikin Poland da Jamus ta mamaye. A ƙarshen yakin, yawan mutanen garin sun kasance
'Yan Jamus sun kwashe garin a ranar 21-22 ga Janairu, kuma a ranar 24 ga Janairu, 1945 gwamnatin Jamus ta bar garin, wanda daga baya ya fada ga Soviets. An nada jami'in Poland na farko a cikin watan Afrilu 1945. Watanni da yawa daga baya aka ba da garin ga Poland, kuma an sake sunan "Dzierzgoń", wanda ya dogara da tsohuwar sunan Prussian Zirgūni. A ƙarshen 1945 da 1946, ƙungiyar juriya ta Poland ta yi nasarar kai hare-hare kan 'yan gurguzu da Soviets, suna samun makamai, kayan aiki da kuɗi. Polan Poland daga yankunan Poland da Tarayyar Soviet ta haɗu da Ukrainians da aka kora daga kudu maso gabashin Poland a 1947 suka sake kafa garin. Tsohon Roman Katolika Cloister yanzu Ikilisiyar Katolika ce ta Gabas ta Gabas ta Ukraine.