Kammala jumla mai zuwa: Nazi Jamus ta kafa "Einsatzgruppe V" a cikin garin, wanda daga baya ya shiga garuruwa da garuruwan Poland da yawa, gami da Grudziądz, Mława, Ciechanów, Łomża da Siedlce, don aikata laifuka daban-daban ga 'yan Poland yayin mamayewar Jamus na Poland, wanda ya fara Yaƙin Duniya na II. An kori 'yan Poland da yawa daga
An kori 'yan Poland da ke zaune a Jamus zuwa aikin tilastawa a kusa da garin. Har ila yau, 'yan Jamus sun gudanar da wani sansanin sansanin sansanin Stutthof a garin. A ranar 30 ga Janairu, 1945 a cikin watanni na ƙarshe na Yaƙin Duniya na II, Sojojin Soviet sun kama garin. Sojojin Red sun kafa asibitin yaƙi a cikin garin don mutane 20,000. Sojojin Soviet sun ƙone kuma sun kwashe cibiyar garin.