Sobibor was a Nazi extermination camp located in occupied Poland during World War II. It operated from May 1942 until October 1943 and was part of the Operation Reinhard plan, which aimed to systematically kill the Jewish population of Europe. An estimated 250,000 people, primarily Jews, were murdered at Sobibor. The camp was designed to deceive victims into believing they were being resettled. Upon arrival, they were taken to gas chambers disguised as showers. In October 1943, a prisoner revolt led to the camp's closure, marking a significant act of resistance against the Nazi regime.