In 1942, the crematorium area was constructed next to the main camp. It included the old crematorium and the new crematorium (Barrack X) with a gas chamber. There is no credible evidence that the gas chamber in Barrack X was used to murder human beings. Instead, prisoners underwent “selection”; those who were judged too sick or weak to continue working were sent to the Hartheim “euthanasia” killing center near Linz, Austria. Several thousand Dachau prisoners were murdered at Hartheim. Further, the SS used the firing range and the gallows in the crematoria area as killing sites for prisoners.
Bergen-Belsen [ˈbɛʁɡn̩.bɛlsn̩], or Belsen, was a Nazi concentration camp in what is today Lower Saxony in northern Germany, southwest of the town of Bergen near Celle. Originally established as a prisoner of war camp, in 1943, parts of it became a concentration camp. Initially this was an "exchange camp", where Jewish hostages were held with the intention of exchanging them for German prisoners of war held overseas. The camp was later expanded to accommodate Jews from other concentration camps.