Long ago, a group of leaders was very unkind. 
Long ago, a group of leaders was very unkind.
At first, the camps were in schools and old buildings. 
Many different people were sent to these camps. Some were arrested for what they believed. Others were treated unfairly because of who they were.
In the camps, people had to do hard work. They often did not have enough food.
Later, many people came to help set them free. Today, we visit museums at these sites. We go there to remember the people.
Between 1933 and 1945, Nazi Germany ran a system of concentration camps. 
At first, the camps were in old buildings like schools or factories. 

Many different groups were sent to these camps. At first, most were members of the Communist Party. Later, the Nazis arrested many others. This included Jews, people who were sick, and people they called criminals. 
Life in the camps was very hard. Prisoners had to do forced labor, which is work they were made to do. They often did not have enough food or good shelter. Many people died in the camps. About one million people died during their time there. 
In 1944 and 1945, Allied soldiers won battles and freed the camps. Today, many of these sites are museums. We visit them to remember the victims.
Between 1933 and 1945, Nazi Germany operated a huge system of concentration camps. 

In the beginning, the camps were not all built for one purpose. 

Many different groups of people were sent to these camps over time. 
Life inside the camps was very harsh and often deadly. Many prisoners were forced to do hard work to help the war effort. This included working in quarries or at brickworks. People often lacked enough food or proper shelter. About 1.65 million people were registered as prisoners in the system. Sadly, about one million of those people died during their imprisonment. Most of these deaths happened during the second half of the war.
Eventually, the camps were liberated by Allied military forces. 
The Nazi concentration camp system was a vast network of detention centers operated by Nazi Germany. This system functioned between 1933 and 1945. It included more than one thousand camps and subcamps. These sites were located in Germany and throughout German-occupied Europe. 
The system began shortly after Adolf Hitler became Chancellor of Germany in January 1933. The Nazis used the Reichstag fire in February 1933 as a reason for mass arrests. The Reichstag Fire Decree removed personal freedoms and allowed for detention without trial. The very first camp was Nohra, which opened in a school on March 3, 1933. Early camps were not purpose-built. They used existing structures like vacant factories, prisons, schools, and even castles. At this stage, the camps were managed by local police, the SS, or the SA. There was no single national system in these first two years.
Between 1934 and 1937, the camps became more organized and institutionalized. Heinrich Himmler and Theodor Eicke played major roles in this change. Eicke became the second commandant of Dachau, which served as a model for other camps. He created a manual of harsh punishments and a system of prisoner functionaries. 
The prisoner population grew rapidly due to changing Nazi policies. Initially, most prisoners were members of the Communist or Social Democratic parties. However, the Nazis soon expanded their targets to include "asocials" and "habitual criminals." 

Forced labor became a central part of the camp system. The SS established companies like German Earth and Stone Works (DEST) to exploit prisoner labor. 

The camps became increasingly lethal as the war progressed. In 1941, the SS began the systematic murder of prisoners deemed "unfit" to work. This included thousands of people sent to euthanasia centers. 

The liberation of the camps began in 1944 and 1945 as Allied forces won victories. 
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