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.
Welcome to the beta version of our new Holocaust Encyclopedia. We are still actively making changes to the site. Please leave us feedback about what you like, don't like, or anything you think could be improved about the site.
![Map titled "Jewish Executions Carried Out by Einsatzgruppen A" [LCID: 200509wu]](https://encyclopedia.ushmm.org/images/thumb/4912b059-5630-4ec5-b3c8-172fe908f148.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)
![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)
![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)
![German troops parade through Warsaw after the invasion of Poland. [LCID: 80487]](https://encyclopedia.ushmm.org/images/thumb/6b473ced-71b7-474b-9519-969ed787dda8.jpg)
