Dee ihe na-aga n'ihu na paragraf a - N'ihi "Anschluss" nke 1938 n'etiti Germany na Austria, Yugoslavia na Reich nke Atọ nwere oke ala ma na-enwe nrụgide na-arịwanye elu ka ndị agbata obi ya na-agbakọ aka na ike Axis. N'April 1939, Ịtali mepere ókèala nke abụọ ya na Yugoslavia mgbe ọ wakporo ma weghara Albania dị nso. Mgbe Agha Ụwa nke Abụọ tiwapụrụ, gọọmenti Yugoslavia kwupụtara nnọpụiche ya. N'agbata September na November 1940, Hungary na Romania sonyeere Nkwekọrịta Atọ ahụ, na-akwado ndị Axis, Ịtali wakporo Gris
Ọ dị mma. Site n'oge ahụ gaa n'ihu, ọ fọrọ nke nta ka ọ bụrụ na mba ndị so n'Òtù Axis na ndị ha na ha na-achị 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. N'ịbụ onye bu n'uche ime ka akụkụ ndịda ya dị nchebe maka mwakpo na-eru nso megide Soviet Union, Adolf Hitler malitere itinye nrụgide siri ike na Yugoslavia iji sonyere Axis. Na 25 Machị 1941, mgbe oge ụfọdụ gachara, gọọmentị Yugoslav bịanyere aka na nkwekọrịta ahụ. Ụbọchị abụọ ka nke ahụ gasịrị, otu ndị ọrụ Royal Yugoslav Air Force nke ndị mba Serbia na-akwado ọdịda anyanwụ, wepụrụ onye na-achị mba ahụ, Prince Paul, n'ọchịchị na-enweghị ọbara, tinye nwa nwanne ya nwoke dị afọ iri na ụma Peter n'ocheeze, ma weta "ọchịchị nke ịdị n'otu mba" nke General Dušan Simović duziri. Ọgbaghara ahụ kpasuru Hitler iwe, onye nyere iwu ozugbo ịwakpo mba ahụ, nke malitere na 6 Eprel 1941.