Auschwitz concentration camp
In their first test, the SS used Zyklon B on 600 prisoners of war from the Soviet Union and about 250 Polish people.p. 88 When the gas killed these prisoners, the SS realized that they could kill people much more quickly with Zyklon B than they could by shooting them. They built a gas chamber, where they could kill over 700 people at a time.p. 160 They also built a crematorium in block 11 of the camp.p. 160