Chelmno was one of the first extermination camps established by Nazi Germany during the Holocaust, operational from December 1941 to January 1945. It is significant for its role in the systematic murder of Jews and other targeted groups, primarily through the use of gas vans, which were mobile units designed for mass executions. The camp exemplifies the brutal efficiency of the Nazi regime's genocidal policies and connects deeply to the broader mechanisms of persecution, including ghettos and Einsatzgruppen.