Pedzisa mutsara unotevera: Panguva ino, kuramba kweYugoslavia kubatana neAxis kwakakonzera hasha dzaHitler. Hurumende yeYugoslavia pasi peMutongi Prince Paul pakutanga yakanga yafarira kubatana neGermany. Asi "kudzorera hurumende" kwakanga kwaputsa hurumende, kwabvisa Mutongi, uye kwakazivisa wechiduku Peter II samambo. Achipindura izvi, Hitler akarayira kuti Yugoslavia ipindwe, "Operation Punishment" ("Strafgericht"). Mukati
kubhomba kweBelgrade, pakati peguta guru reYugoslavia rakaparadzwa uye vanhu 15 000 vakaurayiwa uye vakaitwa vasina pokugara. Kurwisa mabhomba kwakatanga musi wa6 April uye kwakaramba kuchiitwa kwemazuva mana kusvikira musi wa10 April.