 Nyorai kupfuurira kweiyi ndima - Pana 28 June 1914, mugari wenhaka kuchigaro choumambo cheHabsburg, Archduke Franz Ferdinand, akapondwarakanyorwa nomudzidzi wechiBosniaan Serb Gavrilo Princip muSarajevo. Kuchengetedza mukurumbira weAustria-Hungary kwaida kurwiswa kweSerbia, iyo hutungamiriri hweAustria-Hungary hwaifunga kuti ndiyo yaive nemhosva yekuponda. Vatungamiriri vemauto eAustria neHungary vakanga vakatsunga kuparadza kuzvitonga kweSerbia, iyo yavaiona sechinetso chisingagamuchiriki nokuda kwenguva yemberi youmambo hwacho nemhaka yechiverengero chakakura chavagari vemo vokuSouth Slavic. 