The Nazis established Treblinka in 1942. During the Holocaust, an estimated 900,000 Jews were forcibly transferred to and murdered at Treblinka.
Most camps, including hundreds of concentration camps and the other four death camps (Auschwitz-Birkenau, Belzec, Chelmno, and Sobibór), were each situated along a railway. The death camps, also referred to as extermination camps or killing centers, were established to make mass murder more efficient.