20th of September 1939, the Holocaust was triggered when Hitler had decided that Germany should invade Poland, which had begun WWII. Than Hitler had ordered the Polish Jews to be forced into Ghettos and be used for slavery and hard labor. Many died in the Ghettos through malnutrition, diseases and being worked to death. When the Jews were deceased they would be dumped on cart that was pushed by a Nazi member, then they were dumped in giant mass burial pits. The Jews were actually put in there so that when Hitler wanted to start deporting Jews it was easier because they were all in one place and easier to deport(refer to source 2). October 1939, the ‘Euthanasia’ program was carried out. This meant that any German or Austrian citizens that were mentally or physically disabled would be executed, as Hitler believed that their blood was tainted with an incurable disease, therefore their blood was no longer pure German.In February 1940 Hitler had decided to start deporting the Jews to Poland so that he could be rid of them.December 1940 was the month that the first mass murder of Jews had been carried out. Hitler had decided that it was to time to make sure that the future generations had never even heard of a Jew let alone whom they were. It was carried out in Treblinka. The Jews and the Germans who Hitler had believed that their blood was ‘tainted’ would be lined up in a single file line, and then a Nazi member would take them out one by one in the middle of nowhere and shoot them execution style. This was the start of many mass murders for the Jews and the ‘tainted’ blood of Germans.June 1941, Hitler had created mobile killing unites to invade parts of Europe and kill all those he thought were not counted as Germans. Hitler went and first attacked the society unions. It was the first step of quickly and painfully killing the Jews. In September 1941, Hitler had moved the mobile killing squad to Ukraine to kill all Jews in Babi Yar. Within two days the squad viciously killed 33,771 Jews. So many Jews were killed within such a short amount of time that it became classified as the largest single massacre to ever have occurred. In December, 1941 Hitler had created the first death for the Jews and ‘tainted Germans in Chelmno. This is the time when Hitler had created the most productive and inhuman ways of murdering off all of the non-Germans. In, January 1942 the Wansee conference is held to discuss the issues in Germany. The Nazis discuss the different solutions to exterminate the Jewish race. Hitler and the Nazis party had come up with the ‘Final Solution’. Hitler had gone through with the plan as soon as he could. Six death camps were created; Majdanek, Chelmno, Sobibor, Treblinka, Belzec, and Auschewitz-Birkenau, all containing massive gas chambers. Thousands and thousands were killed a day in each death camp.May 1945, the U.S along with allied forces decided that enough is enough and this horrific event must end. They invade Germany and defeat the Nazis forces and save the concentration camp survivors.