The Holocaust was the genocide of approximately 6 million Jews during World War II, as part of a program of deliberate extermination planned and carried out by Nazi Germany under Adolf Hitler. Others were also killed, including ethnic Poles, the Romani, Soviet civilians, Soviet prisoners of war, the disabled, homosexual men and political and righteous opponents.

Most scholars define it as a genocide of only Jews in Germany. The Nazi called it the Final Solution of the Jewish Question. All together, the total amount of people killed during the Holocaust range from 9 million to 11 million. Some people believe that this persecution was acted out in stages. Starting with Concentration Camps. Concentration Camps were started where inmates were used as slave labor until they died of exhaustion or from disease.When the Third Reich conquered new territory in eastern Europe, a specialized unit by the name of Einsatzgruppen murdered Jews and political opponents in mass shootings. Jews and Romani were placed into ghettos before they were taken hundreds of miles by trains to extermination camps. Extermination camps were like games to the Nazis. If the Jews and/or Romani survived the journey, they were killed in gas chambers.

Every person in the Nazi Germany's bureaucracy was involved in the logistics of the mass murder, turning the country into what one Holocaust scholar called " A genocidal State".

Another distasteful part of the Holocaust were the medical experiments carried out on unvolunteering participants of Jews. German physicians carried out experiments at Auschwitz, Dachau, Buchenwald, Ravensbruck, Sachsenhausen, and Natzweiler concentration camps.

The most well known physician of them all was Dr. Josef Mengele, who worked in Auschwitz. His experiments carried out were placing people in pressure chambers, testing drugs on them, freezing them, attempting to change the eye color by injecting chemicals into children's eyes and other amputations and brutal surgeries. Noone really knows how far Mengele went with his studies because the records he sent to Dr. Otmar von Verschuer at the Kaiser Wilhelm Institute were destroyed by Verschuer. Josef Mengele's subjects that survived were killed and dissected. He specialized in working on Romani children. They called him uncle Mengele (or onkel Mongele). He would give them candy and toys. He personally walked them to the gas chamber. Vera Alexander was a Jewish inmate at Auschwitz who looked after 50 sets of Romani twins.

Surgeons performed unthinkable surgeries to these children. They would take twin children away, and "literally sew them together". There parents would then give the children morphine and kill them to end their pain.

One of Hitler's plans was to eliminate all slaves from their lands to make living space for German settlers.