As I seem to recall, the 6 million figure was for Jews with a total number killed in the 17-25 million range depending on source. The beginnings were the mid-1930s but were not nearly as efficient as later efforts.
In two days over 30,000 Jews of Kiev were shot, yes shot, and buried in the gully called Babi Yar. Many tens of thousands additional people were killed in the camp situated in the same area afterward.
The atrocity had been covered up by the Soviet government after the Nuremberg trials in spite of copious records. One of my daughter in laws is from Kiev and it is something she nor her parents knew anything about.
There were at least two other mass executions such as Babi Yar with well over 100,000 killed in a short period of time. When the Nazis got an idea into their head, they went all out to accomplish it.
Last edited by Uglydog2; 03/22/16.
