 Pashure pokumanikidzirwa kusingachinji naAdolf Hitler kuti abatane namasimba eAxis, Yugoslavia yakasaina Chibvumirano cheMatatumusi wa25 March 1941. Mazuva maviri gare gare, coup détat yemauto yakadonhedza hurumende yakanga yasaina chibvumirano, uye hurumende nyowani yakaumbwa pasi pemutungamiriri weRoyal Yugoslav Army Air Force, Armijski đeneral Dušan Simović. Kuunganidzwa kwavose hakuna kudanwa nehurumende itsva kutozosvikira 3 April 1941, nemhaka yokutya kugumbura Hitler uye nokudaro kukonzera hondo. Zuva rimwe chetero rekubudirira, Hitler akanga aburitsa Führer Directive 25, iyo yaida kuti Yugoslavia itariswe senyika ine utsinye; musi wa 3 Kubvumbi, Führer Directive 26 yakaburitswa, ichitsanangura hurongwa hwekurwisa uye chimiro chekutungamira chekupinda, icho chaizotanga musi wa 6 Kubvumbi. 