The initial advance was swift, with the fall of Sebastopol at the end of October, and Moscow coming under attack at the end of the year.
While the bombing of British and German cities continued, and the gas chambers at Auschwitz were put to use, Hitler invaded Russia . Operation Barbarossa, as the invasion was called, began on 22 June. The initial advance was swift, with the fall of Sebastopol at the end of October, and Moscow coming under attack at the end of the year.