Operation Tannenberg Unternehmen Tannenberg | |
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Part of Generalplan Ost | |
![]() The mass murder of Polish townsmen in Reichsgau Wartheland (western Poland) during Operation Tannenberg on 20 October 1939. | |
Location | German-occupied Poland |
Date | September 1939 – January 1940 |
Target | Poles |
Attack type | Genocidal massacre Mass shooting |
Weapons | Firearms Gas vans |
Deaths | 20,000 deaths (during 1–2 months)[1][2] in 760 mass executions by SS Einsatzgruppen |
Perpetrators | ![]() |
Operation Tannenberg (German: Unternehmen Tannenberg, Polish: Operacja Tannenberg) was one of the first anti-Polish extermination actions by Nazi Germany in German-occupied Poland from September 1939 to January 1940.[3] The operation was conducted with the use of the Sonderfahndungsbuch Polen, a proscription list of more than 61,000 members of the Second Polish Republic's elite were to be arrested then interned or shot.[4]
Around 20,000 Poles were arrested and killed by the Einsatzgruppen in a number of mass killings during Operation Tannenberg, which was followed by the shooting and gassing of hospital patients and disabled adults as part of the wider Aktion T4 programme.[5][a]
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