Ramba uchienderera mberi nendima iyi - Panguva ino, kuramba kweYugoslavia kujoina musasa weAxis 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 mokubhomba kweBelgrade
, pakati peguta guru reYugoslavia rakaparadzwa uye vanhu 15 000 vakaurayiwa uye vakasiyiwa vasina pokugara. Kurwisa mabhomba kwakatanga musi wa6 April uye kwakaramba kuchiitwa kwemazuva mana kusvikira musi wa10 April.