Ernst Thälmann

1. Buchenwald concentration camp
   Dates unknown

Ernst Johannes Fritz Thälmann (German: [ɛʁnst ˈtɛːlman]; 16 April 1886 – 18 August 1944) was a German communist politician, revolutionary, and leader of the Communist Party of Germany (KPD) from 1925 to 1933. A committed communist, Thälmann sought to overthrow the Weimar Republic, especially during the instability of its final years, and to replace it with a socialist state based on Marxism-Leninism. Under his leadership, the KPD became intimately associated with the government of the Soviet Union and the policies of Joseph Stalin. The KPD under Thälmann's leadership regarded the Social Democratic Party (SPD) as an adversary and the party adopted the position that the social democrats were "social fascists". Both the SPD and KPD were already previously split on many key issues, however, this new stance clarified it was impossible for the two parties to form a united front against the Nazi Party. Thälmann was leader of the paramilitary Roter Frontkämpferbund. After the Nazi regime began, he was arrested by the Gestapo in 1933 and held in solitary confinement for eleven years. Stalin and Vyacheslav Molotov originally sought Thälmann’s release; after the Molotov–Ribbentrop Pact, efforts to that end were abandoned, while Thälmann's party rival Walter Ulbricht ignored requests to plead on his behalf. Thälmann was shot dead on Adolf Hitler's personal order in Buchenwald concentration camp in 1944.