Ka kammala wannan magana: A lokacin yaƙin duniya na biyu da 'yan Nazi suka yi, an san Fort VII a matsayin sansanin fursunoni na Nazi, inda 'yan Poland 20,000 suka mutu. Tsakanin 1940 da 1945, Fort Grolman da Fort Rauch sun kasance ainihin sansanin POW na Stalag XXI-D. A ƙarshen yaƙin an ayyana Poznań a matsayin ɗayan biranen da ke da ƙarfi ("Festungen") waɗanda Nazis ke niyyar karewa a kowane farashi, don haka aka sake sunan "Festung Posen". An yi amfani da sansanin soja na waje don kare birnin a lokacin
Yaƙin Poznań (1945), kuma Fort Winiary shine ƙarshen juriya na masu karewa, wanda ya haifar da babbar lalacewa. Bayan yakin an canza wurin Fort Winiary zuwa filin shakatawa na Cytadela.