Treblinka extermination camp
The goal of death camps like Treblinka was to kill millions of people as quickly as possible.  Treblinka was open from July 23, 1942, to October 19, 1943, during Operation Reinhard, the deadliest part of The Holocaust.  At Treblinka, the Nazis killed at least 700,000 and 900,000 Jewish people, and at least 2,000 Roma people.  The Nazis killed more Jews at Treblinka than at any death camp other than Auschwitz.