During that time, approximately 2.3 million people were imprisoned in concentration camps — and more than 1.7 million died there. This included six million Jewish people, approximately 3.3 million Soviet prisoners of war, and around 1.8 million non-Jewish Poles. Since the Holocaust, historians have worked to reconstruct what life looked like in Nazi concentration camps. While some of this work served a real purpose toward the Nazi war effort, other tasks were deliberately pointless. The End Of The DayAs the day concluded, prisoners would march back to camp.