 World War II brought administrative change, as Łódź and the surrounding area were incorporated in the Third Reich as Wartheland.On 1 January 1940 Retkinia was incorporated into the city of Łódź by the German administration under the name of Erzhausen.The Polish population was evicted from their land in 1942-1943, and the total number of wartime casualties among the residents of Retkinia amounted to 144.