plan, later known as Akiton Reinhard (Operation Reinhard), consisted of the construction of three mass killing camps – Belzec, Sobibor and Treblinka II (USHMM). Belzec, built first to experiment with death by gassing, significantly advanced the mass extermination of the Jews by refining gassing techniques, developing an efficient yet, deceptive and inhumane handling of its victims, and lastly, maintaining secrecy until the aftermath of the