Established in March 1933, Dachau was the first Nazi concentration camp.12 The camp originally housed political prisoners and those opposed to the Nazi regime. Individuals and groups who were considered inferior to Germans, such as Jehovah Witnesses, Gypsies and homosexuals were sent to Dachau. The first Jews imprisoned at Dachau were sent there because they were considered enemies of the Reich.13 Over time, more Jews were sent to Dachau than any other group.
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.