SdP grundlagde i 1933 uofficielt den paramilitære organisation ''Freiwillinger Schutzdienst'' ("Frivillig Skyttetjeneste", også kendt som ''Ordnersgruppe''). I maj 1937 blev tilknytningen til officiel, men allerede den 16. september 1937 blev organisationen. Den 17. september 1938 blev organisationen omdannet til et egentligt [[frikorps]] under navnet [[Sudetendeutsches Freikorps]] efter forbillede fra det tyske nazipartis frikorps [[Sturmabteilung]].
<ref>''Munich, 1938: Appeasement and World War II'', af David Faber, p. 316 "His chosen method was the establishment of the Sudeten German Freikorps, a terrorist organization which brought together and armed all those Sudeten Germans who had fled Czechoslovakia for Germany"</ref><ref>''The Surreal Reich'' p.144, Joseph Howard Tyson 2010, "Political agitator Konrad Henlein, with the collusion of Nazi secret service agencies, engaged in terrorism against Prague's government. Over one hundred of his Freikorps irregulars had been killed in two-hundred-some commando raids</ref><ref>''Czechoslovakia between Stalin and Hitler'', p. 212, Igor Lukes 1996, "The party's specialists in low-level warfare, the ''Sudetendeutsches Freikorps'', were among those who eagerly awaited an opportunity to attack. 14 They had been trained in the art of terrorism by ''Wehrmacht'', SS, and SA instructors"</ref><ref>''Canaris: The Life and Death of Hitler's Spymaster'', p. 134, Michael Mueller 2007: "to guarantee the protection of the Sudeten Germans and maintain the unrest and disturbances; terror squads were to be formed from the Freikorps's sub-unit to create constant unrest in the border region"</ref>
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