The Second World War (1939-1945)
Senior 6 · History
The Second World War (1939-1945)
Lesson 3 of 5
25 min
On 12 April 1945 General Dwight D. Eisenhower, the supreme commander of the Allied forces in western Europe, visited Ohrdruf, a camp near Gotha in Germany that American troops had just reached. Three days later he wrote to General George C. Marshall, the head of the US Army. Read what he said about why he went. Then think about why a general in the middle of a war believed that one day people would try to deny what he had seen.
Important
Source: Eisenhower to Marshall, 15 April 1945 (extracts)
"The things I saw beggar description. […] the visual evidence and the verbal testimony of starvation, cruelty and bestiality were so overpowering as to leave me a bit sick. […] I made the visit deliberately, in order to be in position to give first-hand evidence of these things if ever, in the future, there develops a tendency to charge these allegations merely to 'propaganda'."
General Dwight D. Eisenhower to General George C. Marshall, 15 April 1945, as quoted by the U.S. National Park Service, "Documenting History: Eisenhower and the Holocaust".
Eisenhower then had soldiers, journalists and members of the United States Congress brought to the camps to see for themselves. His letter shows that evidence of genocide must be gathered and preserved deliberately, because perpetrators destroy evidence and deniers attack it. Rwanda knows this well: denial of the 1994 Genocide against the Tutsi is a crime under Rwandan law, and memorials and archives preserve the evidence.
Definition
The Holocaust (in Hebrew, the Shoah): the systematic, state-sponsored persecution and murder of six million European Jews by Nazi Germany, its allies and collaborators between 1933 and 1945.
Genocide: a word created in 1944 by the Polish-Jewish lawyer Raphael Lemkin for the destruction of a national, ethnic, racial or religious group. The United Nations Genocide Convention (1948) made it a crime under international law.
Ghetto: a closed district of a city where the Nazis forced Jews to live, cut off from the rest of the population.
Killing centre (extermination camp): a camp built mainly to murder people on arrival, such as Treblinka, Sobibor, Belzec, Chelmno and Auschwitz-Birkenau.
Collaborator: a person or government in an occupied country that helped the occupier.
The Holocaust did not begin with killing. It began with words and laws that marked Jews as outsiders (Unit 5), continued with segregation and theft of property, and only then turned to mass murder. In occupied eastern Europe from June 1941, German mobile killing units, police battalions and local collaborators shot Jews in their hundreds of thousands. At the Wannsee Conference in Berlin on 20 January 1942, senior officials met to coordinate the deportation of all Europe's Jews, which the Nazis called the "Final Solution". Jews were deported by rail from across Europe to killing centres in occupied Poland. Auschwitz-Birkenau, the largest, was both a concentration camp and a killing centre.
| Group | Estimated number murdered (United States Holocaust Memorial Museum) |
|---|---|
| European Jews | about 6 million, around two-thirds of the Jews of Europe |
| Soviet prisoners of war | around 3 million |
| Roma and Sinti | between 250,000 and 500,000 |
| People with disabilities, in institutions | up to 250,000 |
Millions of Polish and Soviet civilians, political opponents, Jehovah's Witnesses and gay men were also persecuted, and many were killed. The figures are estimates built from German records, wartime and post-war population counts and survivors' testimony; they are given as ranges because the perpetrators tried to hide their crimes.

The International Military Tribunal at Nuremberg (1945–46) tried leading Nazis for crimes against peace, war crimes and crimes against humanity. In 1948 the United Nations adopted the Genocide Convention, built on Lemkin's work. Fifty years later, in 1998, the International Criminal Tribunal for Rwanda, in the case of Jean-Paul Akayesu, delivered the first judgment by an international court convicting a person of genocide under that convention, for crimes committed during the 1994 Genocide against the Tutsi. Unit 8 studies genocide prevention.
Warning
Use precise, respectful language. Say "murdered" and "killed", not "died", when people were killed; avoid the perpetrators' euphemisms ("Final Solution", "resettlement") unless you put them in quotation marks and explain them. Give victim numbers as estimates with their source. Never compare genocides to rank suffering; compare them to understand how they happen and how they can be prevented.
Tip
Explain the process, not only the outcome. Examiners reward answers that show how persecution escalated: definition (laws), segregation (ghettos), deportation, and murder, and that explain the roles of ideology, war, bureaucracy and ordinary people. The same framework helps you analyse other genocides, including the one Rwanda suffered in 1994.
Important
Discuss. Eisenhower wanted first-hand evidence in case people later called the crimes "propaganda". Why do perpetrators and their supporters deny genocide, and what can historians, courts, memorials and ordinary citizens do to protect the truth?
Note
Further viewing, with your teacher
The United States Holocaust Memorial Museum's film The Path to Nazi Genocide (38 minutes) tells this history from the end of the First World War to the Holocaust. It contains distressing archival footage, so watch it only with your teacher.
Practice
Sources and credits
Written by Ganzaa: the analysis, the diagram, the tables, the definitions and the exercises.
This lesson adapts CC BY-SA material and is shared under CC BY-SA 4.0.