 By this point, Zbor was infiltrated by the German Gestapo, the Abwehr (German military intelligence), and the "Schutzstaffel" (SS).In 1940, the Royal Yugoslav Army purged its pro-German elements and Ljotić lost much of the influence he held over the armed forces.Ljotić's followers responded to the Cvetković–Maček Agreement with violence, clashing with the youth wing of the Communist Party of Yugoslavia (KPJ).