A lot of major events took place in WW2 including pearl harbor, The Holocaust, the storm of Normandy and many other events. The Holocaust was a major event in WW2, millions of Jews were killed during the Holocaust. Hitler demanded Jews to work in camps and in those camps they would starve to death. they were put in cramped little rooms, that even people suffocated and died. they were put in gas chambers and even worse they were shot, burned, and hanged.