Operation Tannenberg

Operation Tannenberg was codename for one of extermination actions directed at Polish intelligentsia during World War II. Nazis prepared lists, so called Sonderfahndungsbuch Polen, which listed more than 60.000 of Polish activists, intelligentsia, actors, former officers etc. First, in August 1939 about 2.000 Polish activist of Polish minority in Germany were arrested and murdered. Second part of the action started in September the 1st, 1939 and ended in October resulting in at least 20 thousand murdered in 760 masss executions by special units, so called Einsatzgruppen, in addition to regular Wehrmacht units and SS.