The document summarizes key events and aspects of the Holocaust: 1) Adolf Hitler rose to power in Germany from 1933 to 1945 and enacted racist policies that targeted Jews. 2) The Holocaust refers to the mass murder of around 6 million European Jews and others by the Nazi regime between 1938 and 1945. 3) Jews were forced by Nazis to live in overcrowded ghettos surrounded by barbed wire and later deported to concentration and extermination camps. 4) Concentration camps imprisoned people for forced labor while extermination camps, like Auschwitz, used gas chambers and other methods to systematically murder victims, mostly Jews. Over 11 million people were killed in the Holocaust.