The Holocaust was the world war II genocide of the European Jews. Murdering around 6 million Jews between the dates 1941-1945 which was equal to two-thirds. The Nazi used many methods to kill the Jews including work and getting gassed. After Germany invaded Poland world war II was triggered and ghettos were set up to segregate the Jews. All Jewish citizens were expected to wear a yellow star on their clothing, The Star of David. So that it was easy for the Nazis to tell who was in which group.