After the joint German-Soviet invasion of Poland, which started World War II in September 1939, the town was occupied by Germany until 1945. The first expelled Poles were former insurgents of the Greater Poland Uprising, and the expulsions were carried out in early December 1939.[4] The expellees were held for several days in a transit camp in the nearby village of Kowanówko, where they were robbed of money and valuables, and then they were deported in freight trains to Sokołów Podlaski in the General Government in the more-eastern part of German-occupied Poland.[4] In 1940, a transit camp for Poles expelled from various villages in the county was operated in the town.[5] Some of the Poles expelled in 1940 from the nearby Chodzież and Szamotuły counties were enslaved as forced labour in the town's vicinity.[6] The Grey Ranks printed Polish underground press in Oborniki, which was distributed throughout the county.[7] In August 1944, the Germans carried out mass arrests of local members of the Home Army, the leading Polish underground resistance organization.[8]
^Atlas historyczny Polski. Wielkopolska w drugiej połowie XVI wieku. Część I. Mapy, plany (in Polish). Warszawa: Instytut Historii Polskiej Akademii Nauk. 2017. p. 1a.
^ abWardzyńska, Maria (2017). Wysiedlenia ludności polskiej z okupowanych ziem polskich włączonych do III Rzeszy w latach 1939-1945 (in Polish). Warszawa: IPN. p. 154. ISBN978-83-8098-174-4.
^Encyklopedia konspiracji Wielkopolskiej 1939–1945 (in Polish). Poznań: Instytut Zachodni. 1998. p. 96. ISBN83-85003-97-5.
^Ptakowska-Sysło, Agnieszka (2011). "Konspiracja chodzieska 1939–1944". Biuletyn Instytutu Pamięci Narodowej (in Polish). No. 5–6 (126–127). IPN. p. 67. ISSN1641-9561.
^"Ser liliput wielkopolski". Ministerstwo Rolnictwa i Rozwoju Wsi - Portal Gov.pl (in Polish). Retrieved 30 May 2021.
^"Herk-de-stad". UM Oborniki (in Polish). Retrieved 10 August 2019.
^"Kobuleti". UM Oborniki (in Polish). Retrieved 10 August 2019.
^"Lüchow". UM Oborniki (in Polish). Retrieved 11 August 2019.