The very first concentration camp was set up in Dachau, Germany in 1933. Concentration camps kept opening up and being used all the way through to the end of World War II in 1945. As so many camps opened their had to be someone to build them for the prisoners of war, and believe it or not it was the prisoners themselves who had to build their own soon to be torture and sleeping chambers. In the Holocaust up to 6 million Jewish citizens died in either concentration camps or on the street. In the concentration camps people were either killed by being shot, gassed with poisonous gasses, tortured, or by catching a deathly disease or virus but prier to this they had to live in poor, poor living conditions.