Nazi Germany and its allies established more than 40,000 work, concentration and death camps for the forced labor, detention and mass murder of those targeted by the Nazi regime as enemies of the state.
In 1941, Treblinka was established in Nazi-occupied Poland as a forced-labor camp for Jews and non-Jewish Poles. One year later, a killing center was constructed. That is why Treblinka was both a concentration camp and a death camp. Prisoners selected from transports to Treblinka were forced to provide labor to support the main function of the camp: mass murder. Out of the 900,000 people brought to Treblinka, only 67 survived.
Source: Holocaust Encyclopedia. The United States Holocaust Memorial Museum.