he Sobibor extermination camp was the second killing center established as part of Operation Reinhard. This operation was the organized killing of all the Jews in German-occupied Poland. Sobibor, along with Belzec and Treblinka, systematically killed thousands of Jews in a horrifying process. Jews were brought to Sobibor by train, forced to undress, and then marched through a tunnel, called “the tube,” to the gas chambers labeled as showers. Only a few Jews survived Sobibor, many being used as forced laborers to clean up after the executions. In October 1943, prisoners, sensing a slowing of operations, staged an uprising where more than 100 prisoners escaped. Sobibor was closed at the end of 1943 when Operation Reinhard ended after 1.7 million Jews had been killed.