Starting in 1939, gas chambers were used as part of the Nazi painless killing program aimed at getting rid of disabled people. Experiments in the gassing of patients were done in October 1939 in occupied Posen in Poland. Hundreds of prisoners were killed by deadly gas poisoning in gas chambers. In 1940 gas chambers using bottled pure deadly gas were established at six concentration camps in Germany. Also with people with disabilities, these camps were also used to kill prisoners brought from other concentration camps in Germany, Austria, and Poland. Killings of concentration camp inmates kept going after the mercy killing program was shut down in 1942. During the invasion of Russia, mass executions by exhaust gas were performed using gas vans, trucks changed to put engine exhaust into a sealed interior gas chamber. …show more content…
Gas vans were used at the Chelmno extermination camp. The Operation Reinhard extermination camps at Belzec Sobibor, and Treblinka used exhaust fumes from unmoving diesel engines . In search of producing more with less waste killing methods, the Nazis experimented with using the hydrogen based fumigant Zyklon B at the Auschwitz concentration camp. This method was adopted for mass killings at the Auschwitz and Majdanek camps. Up to 6000 victims were gassed with Zyklon-B each day at Auschwitz. Most extermination camp gas chambers were taken apart or destroyed in the last months of the World War II as Soviet troops approached, except for those at Dachau, Sachsenhausen and Majdanek. One destroyed gas chamber at Auschwitz was rebuilt after the war to stand as a