Sachsenhausen was opened in 1936 outside Berlin, and built as a model camp to train SS guards. Between 1936 and 1945, nearly 200,000 people were imprisoned at the camp. Inmates were subjected to forced labour including creating bricks for major Reich building initiatives, and armaments production for AEG and Siemens. Sachsenhausen had over 100 subcamps. At least 30,000 people died at Sachsenhausen.