JUNE 22, 1941

KILLING SQUADS ACCOMPANY GERMAN INVASION OF THE SOVIET UNION

German mobile killing squads, called special duty units (Einsatzgruppen), are assigned to kill Jews during the invasion of the Soviet Union. These squads follow the German army as it advances deep into Soviet territory, and carry out mass-murder operations. At first, the mobile killing squads shoot primarily Jewish men. Soon, wherever the mobile killing squads go, they shoot all Jewish men, women, and children, without regard for age or gender. By the spring of 1943, the mobile killing squads will have killed more than a million Jews and tens of thousands of partisans, Roma (Gypsies), and Soviet political officials.

DECEMBER 8, 1941

FIRST KILLING CENTER BEGINS OPERATION

The Chelmno extermination camp begins operation. The Nazis later establish five other such camps: Belzec, Sobibor, Treblinka, Auschwitz-Birkenau (part of the Auschwitz complex), and Majdanek. Victims at Chelmno are killed in gas vans (hermetically sealed trucks with engine exhaust diverted to the interior compartments). The Belzec, Sobibor, and Treblinka camps use carbon monoxide gas generated by stationary engines attached to gas chambers. Auschwitz-Birkenau, the largest of the killing centers, has four large gas chambers using Zyklon B (crystalline hydrogen cyanide) as the killing agent. The gas chambers at Majdanek use both carbon monoxide and Zyklon B. Millions of Jews are killed in the gas chambers in the extermination camps as part of the "Final Solution."

JANUARY 20, 1942

WANNSEE CONFERENCE AND THE "FINAL SOLUTION"

The Wannsee Conference, a meeting between the SS (the elite guard of the Nazi state) and German government agencies, opens in Berlin. They discuss and coordinate the implementation of the "Final Solution," which is already under way. At Wannsee, the SS estimates that the "Final Solution" will involve 11 million European Jews, including those from non-occupied countries such as Ireland, Sweden, Turkey, and Great Britain. Between the fall of 1941 and the fall of 1944, the German railways transport millions of people to their deaths in killing centers in occupied Poland.