In Jan - Mass killings of Jews using Zyklon-B begin at Auschwitz Birkenau in Bunker 1. After, the bodies were buried in mass graves in a nearby meadow.

In March - In Poland, Belzec extermination camp becomes operational. This camp is fitted with permanent gas chambers using carbon monoxide piped in from engines placed outside the chamber, but the carbon monoxide will later be substitute with Zyklon-B.

In May - In Poland, Sobibor extermination camp becomes operational. The camp is fitted with three gas chambers using the same methode as Belzec.

June 30, 1942 - At Auschwitz, a second gas chamber, is made operational at Birkenau because of the number of Jews arriving.

July 23, 1942 - Treblinka extermination camp opened in Poland, east of Warsaw. The camp is fitted with two buildings containing 10 gas chambers, each holding 200 persons. The methode of carbon monoxide is also used here. The bodies are burned in open pits.



March 22, 1943 - New gas chamber/crematory IV opens at Auschwitz.

March 31, 1943 - New gas chamber/crematory II opens at Auschwitz.

April 4, 1943 - New gas chamber/crematory V opens at Auschwitz.

June 25, 1943 - New gas chamber/crematory III opens at Auschwitz. With its completion, the four new crematories at Auschwitz have a daily capacity of 4,756 bodies.



Summer 1944 - Auschwitz-Birkenau records its highest-ever daily number of persons gassed and burned.The total reaches just over 9,000. Six large pits are used to burn bodies. .

Oct 28, 1944 - The last transport of Jews to be gassed, 2,000 from Theresienstadt, arrives at Auschwitz.

Oct 30, 1944 - Last use of gas chambers at Auschwitz.