Nyorai kuenderera mberi kweiyi ndima - Serbia yakarwa muHondo dzeBalkan dza1912<unk>13, idzo dzakamanikidza maOttoman kubuda muBalkans uye dzakapetwa kaviri ndima uye huwandu hwevanhu veHumambo hweSerbia. Muna 1914, mumwe mudzidzi wechiduku wechiSerb wokuBosnia ainzi Gavrilo Princip akaponda Archduke Franz Ferdinand weAustria, izvo zvakananga zvakabatsira kutanga Hondo Yenyika I. Mukurwisana kwakatevera, Serbia yakapinda neAustria-Hungary. Pasinei nokuva vashoma, vaSerbia vakakunda vaAustria-Hungary muHondo yeCer, iyo yakaratidza kukunda kwokutanga kweAllied pamusoro peCentral Powers muhondo. Kumwe kukunda muhondo dzeKolubara
uye Drina zvaireva kuti Serbia yakaramba isina kukundwa sezvo hondo yakapinda mugore rayo rechipiri. Zvisinei, kupinda kwamasimba eGermany, Austria-Hungary neBulgaria kwakaparadza vaSerbia munguva yechando ya1915, uye kudzoka kwakatevera kweHondo yeSerbia kuburikidza neAlbania kwakatora hupenyu hwevaSerbia vanopfuura 240 000. Mauto eSerbia akapedza makore akasara ehondo achirwa paSalonika Front muGreece, vasati vasunungura Serbia kubva kuAustria-Hungary munaNovember 1918. Serbia yakatambura mwero mukurusa wokurasikirwa muHondo yeNyika I.