In April 1940, the Germans arrested local Polish teachers.[4] The local school principal and teachers were among Polish teachers murdered in the Mauthausen concentration camp.[5] In June 1940, the Germans expelled 88 Poles, whose homes were handed over to German colonists as part of the Lebensraum policy.[6] In October 1941, all the community's Jewish population was sent to a ghetto in Kowale Pańskie where in July 1942 most were sent to the Chełmno extermination camp where they were immediately gassed. A few were sent to the Łódź Ghetto. There were few survivors among Uniejów's Jewish population, perhaps around 20.