Holocaust ww2 when, where, what, how, who,

In March 20th, 1933 Hitler opens the Dachau concentration camp.
It was opened outside of Munich.
The Holocaust was the systematic, bureaucratic, state-sponsored persecution and murder of six million Jews by the Nazi regime and its collaborators. Holocaust is a word of Greek origin meaning "sacrifice by fire." The Nazis, who came to power in Germany in January 1933, believed that Germans were "racially superior" and that the Jews, deemed "inferior," were an alien threat to the so-called German racial community.
Hitler decided to do it by his power. 
An Adolf Hitler decided to.