Background to the Concentration Camps can be found at Holocaust FAQ
Beginning in March 1942, a wave of mass murder swept across Europe. During the next 11 months 4,500,000 human beings were eliminated. By the end of World War II the toll had risen to approximately 6,000,000 Jews, which included 1,500,000 children, who perished at the hands of the Nazi murderers. When the killing ended those who survived were released from the concentration camps and came out of hiding. Here you can read some of their stories.