World War 2 By tiannakasperbauer 1933 Dachau, one of the first concentration camps, is opened in Germany 1938 A national anti-Jewishriot, destroys thousands of business and places of worship. This is because of the starting of concentration camps. 1939 Germany occupies Poland putting about two million more Jews under Nazi Control. 1941 The first fatal gassing of concentration camp prisoners take place in Auschwitz. 1942 Six major concentration camps were fully opened. 1945 All remaining concentration camps are liberated by allied forces.