 Complete the following phrase:  Thälmann was also leader of the paramilitary Roter Frontkämpferbund which was banned as extremist by the governing social democrats in 1929. In 1932 he established Antifaschistische Aktion. He was arrested by the Gestapo in 1933 and held in solitary confinement for eleven years; for political reasons, Stalin did not seek his release when he entered into the 