 The Nazi secret plan Generalplan Ost ( " General Plan for the East " ) , which was prepared in 1941 and confirmed in 1942 , called for a " new order of ethnographical relations " in the territories occupied by Nazi Germany in Eastern Europe . The plan envisaged ethnic cleansing , executions and enslavement of the overwhelming majority of the populations of conquered counties with very small differing percentages of the various conquered nations undergoing Germanization , expulsion into the depths of Russia and other fates . The net effect of this plan would be to ensure that the conquered territories would be Germanized . It was divided into two parts : the Kleine <unk> ( " Small Plan " ) , which covered actions to be taken during the war , and the Große <unk> ( " Large Plan " ) , which covered actions to be undertaken after the war was won , and to be implemented gradually over a period of 25 to 30 years . 
