The Czech Josef Kroupa had to sort post at the post office SW 11 (now Hotel Wyndham). He was housed in the barrack camp of the Reich Postal Directorate in Lichtenrade. Like most camps, this one was also located very close to tenements of the German population.
Over 400,000 young Czechs were required to go to the “Totaleinsatz” in the German Reich. In the racist Nazi hierarchy, they were between Western Europeans and Eastern workers.