Rubuta ci gaba don wannan sakin layi - A lokacin da Jamus ta mamaye Poland a 1939, Rumia ya kasance wani yanki na gwagwarmaya mai tsanani. Matsayi ne na gefen babban layin tsaron Poland a Kępa Oksywska. Kaburbura biyu na sojoji suna cikin yankin. Sojojin Rundunar Sojoji ta 207 (Wehrmacht) da membobin SS sun kashe mutane 18 a Rumia 11<unk>12 Satumba 1939. A lokacin Yaƙin Duniya na II, an mamaye garin
Nazi Jamus, wanda ya haɗa shi da lardin Reichsgau Danzig-West Prussia kuma ya sake masa suna zuwa Rahmel. A watan Satumba da Oktoba 1939, SS da SD sun tsoratar da 'yan asalin Poland da yahudawa. Yawancin wadanda aka kashe ko dai an kashe su a wani wurin da aka kashe mutane da yawa a Piaśnica ko kuma aka tura su zuwa sansanin fursunoni na Stutthof. Kimanin rabin mazaunan garin kafin yaƙin an kore su daga 1939 zuwa 1941, galibi ga Gwamnatin Janar. An kuma tura mutane da yawa zuwa aiki na tilas kusa da Szczecin. Garin ya kuma kasance wurin tsare dubban fursunonin yaƙi, galibi daga Burtaniya, Faransa da Italiya. An kafa sansanin aikin tilas da kuma masana'antar kera jiragen sama a kusa da garin. A cikin 1945, jim kaɗan kafin Red Army ta 'yantar da garin, an lalata filin jirgin sama na gida ta hanyar harin bam na RAF.