Mezue ahịrịokwu na-esonụ: N'ihi "Anschluss" nke March 1938, bụ́ nke Germany jikọtara Austria na ya, Yugoslavia bịara soro Germany kerịta ókèala ya nke ebe ugwu ọdịda anyanwụ ma daba n'okpuru nrụgide na-arịwanye elu ka ndị agbata obi ya jikọtara onwe ha na ike Axis. N'April 1939, n'Ịtali
wakporo ma weghara Albania, si otú ahụ guzobe ókèala ala nke abụọ na Yugoslavia. Mgbe Agha Worldwa nke Abụọ malitere, Gọọmentị Royal Yugoslav kwupụtara nnọpụiche ya. N'agbata September na November 1940, Hungary na Romania sonyeere Nkwekọrịta Atọ ahụ, na-akwado ndị Axis, Ịtali wakporo Gris. Ka ọ na-erule n'oge ahụ, ọ fọrọ nke nta ka ọ bụrụ na mba ndị nọ n'Axis na ndị ha na ha na-emekọ ihe gbara Yugoslavia gburugburu kpamkpam, nnọpụiche ya n'agha ahụ bịakwara ka njọ. Ná ngwụsị February 1941, Bulgaria sonyeere Nkwekọrịta ahụ. N'echi ya, ndị agha Germany si Romania banye Bulgaria, na-emechi mgbanaka ahụ gbara Yugoslavia gburugburu.