Tuhia he tohutoro mō tēnei wāhanga - I tēnei wā, ko te kore o Yugoslavia ki te uru atu ki te puni Axis i puta ai te riri o Hitler. Ko te kawanatanga o Yugoslavia i raro i te Regent Prince Paul i te tuatahi i pai ki te whakauru ki Tiamana. Engari i hurihia te kāwanatanga e tētahi "coup d'état", i whakakahoretia te Rangatiratanga, a, i whakapuakina te taiohi a Peter II hei kingi. Hei whakautu ki tenei, i whakahau a Hitler i te whakaekenga o Yugoslavia, "Operation Punishment" ("Strafgericht"). I te wā o te whakaekenga o Belgrade
, i whakangaromia te pokapū o te taone nui o Yugoslavia, ā, 15,000 ngā tāngata i mate, i noho kore kāinga. I tīmata te whakaeke i te 6 o Aperira, a, e wha nga ra i haere tonu ai tae noa ki te 10 o Aperira.