The Holocaust is the best documented case of genocide. Despite this, calculating the numbers of individuals who were killed as the result of Nazi policies is an impossible task. There is no single wartime document that spells out how many people were killed. And in some cases, contrary to popular opinion, records were not kept.
![Map titled "Jewish Executions Carried Out by Einsatzgruppen A" [LCID: 200509wu]](https://encyclopedia.ushmm.org/images/thumb/4912b059-5630-4ec5-b3c8-172fe908f148.jpg)
![German troops parade through Warsaw after the invasion of Poland. [LCID: 80487]](https://encyclopedia.ushmm.org/images/thumb/6b473ced-71b7-474b-9519-969ed787dda8.jpg)
![Women survivors huddled in a prisoner barracks shortly after Soviet forces liberated the Auschwitz camp. [LCID: 31450b]](https://encyclopedia.ushmm.org/images/thumb/8fdec1b8-47fa-40f1-9a27-06e7262bad5e.jpg)
![German forces enter Aachen, on the border with Belgium, following the remilitarization of the Rhineland. [LCID: 70032]](https://encyclopedia.ushmm.org/images/thumb/4d587734-0984-4f9f-9d7d-5e2b5e87dacc.jpg)
![Jews carrying bundles of possessions before their deportation from the Kovno ghetto. [LCID: 10687]](https://encyclopedia.ushmm.org/images/thumb/1d5950dc-d9a7-47e4-903c-c3c135c46ef1.jpg)
