The Reichswehr military organization, as it was reorganized under General Hans von Seeckt and Defence Minister Otto Gessler, evaded these prohibitions through a variety of measures. Safeguarding its secrecy, Gessler and Reichswehr officials denied the organization's existence to the Reichstag and other institutions. After the Third Silesian Uprising, the military, with von Seeckt's knowledge, provided arms to "Freikorps" members and other paramilitary groups, who, after the end of the hostilities, stashed their weapons away and reorganized as labour battalions under the command of Major Fedor von Bock, comprising about 2,000 service members and further 18,000 reservists, concentrated around the garrison town of Küstrin in Brandenburg. Black Reichswehr paramilitary forces comprised the SA troops of the Nazi Party, "Der Stahlhelm" organization, and numerous Freikorps like the Marinebrigade Ehrhardt, its Organisation Consul successor or Bund Oberland.