They were kept in camps for racial evaluation, to prevent contamination of the native German population.[8] There they were divided into groups: A, Altreich, who were to be settled in Germany and allowed neither farms nor business (to allow for closer watch), S Sonderfall, who were used as forced labor, and O Ost-Fälle, the best classification, to be settled in the 'Eastern Wall' — the occupied regions to protect Germany from the East—and allowed independence.[9] This last group, after spending some time in refugee camps in Germany, were eventually resettled in Polish areas annexed by Nazi Germany and in Zamość County, as decided by Generalplan Ost.