Rubuta ci gaba don wannan sakin layi - A ranar 1 ga Satumba, 1939, ranar farko ta Yaƙin Duniya na II, Luftwaffe na Nazi Jamus ya yi ruwan bama-bamai da Żnin. Kwana tara bayan haka, sojojin Jamus suka shiga garin, wanda aka sake masa suna "Dietfurt" kuma ana gudanar da shi a cikin Landkreis Dietfurt (Wartheland). An sauya sunayen tituna da sunayen shugabannin Nazi ko kuma sunayen da suke kama da na Jamus. Babu makaranta ga 'yan Poland; yara dole su yi tafiya zuwa Góra, ƙauyen gabashin Żnin. An kori 'yan Poland 600, tare da 200 da aka kai aikin tilas ko sansanonin Nazi. A watan Nuwamba da Disamba na 1939, an harbe 'yan gudun hijirar, galibi' yan tawaye na 1919, a wurare daban-daban a kusa da garin. A lokacin mamayar
, Jamusawa kuma sun kafa kuma sun gudanar da kurkukun Nazi a cikin garin. Bayan yaƙin, a ranar 21 ga Oktoba, 1945, an sake yin jana'izar mutane 62 da aka binne a Gąsawa. A ƙauyen Góra (yanzu wani ɓangare na Żnin), an yi jana'izar Yahudawa 100 da aka kashe a sansanin fursunoni na Murczyn da ke kusa, kuma an buɗe wani abin tunawa da masu sana'a na Żnin suka yi a ranar 11 ga Disamba, 1987.