Concentration camps
Between 1933 and 1945, concentration camps were a major feature of Hitler’s dictatorship. Political opponents of the Nazi Party were held prisoners in these camps. For the benefit of the Nazis, they worked as forced laborers in numerous activities. These activities included quarry mining, expanding the camp, burying (in ditches)/burning (furnace) the dead, etc.
When Germany attacked Poland in 1939, larger groups of both political and territorial prisoners were sent to concentration camps, many of which were Jewish. Because there were now thousands upon millions of new potential forced laborers, the camp expanded its functions. At this time, the use of gas chambers and crematoriums increased, which led to skyrocketing death rates and murders.
German guards called the SS monitored the concentration camps. They deliberately mistreated prisoners for their own benefit and left them undernourished. Because of this, millions of Jews died in the concentration camps. Without any consideration to their safety, many prisoners believed that “they were being annihilated through work. (ushmm.org)”