Currently, I am reading a book on the Holocaust and surprised to read that there were no actual death camps in Germany during WWII. Of course people died in concentration camps
but not as a defined method of killing They died from Malnutrition and other such diseases' such as Cholera, Diphtheria,Typhus and of course exhaustion.
Typical of the Nazi's that they would murder people in other parts of Europe and not Germany.

Of course , this has led to a great deal of Holocaust denial, even to the extent of putting the Einsatzgruppen onto a pedestal that should be known only for murderers as they were the group that came behind the main onslaught and eradicated the remaining survivors. The deadly babies and old people.