I lenei taua, na manatu ai tagata mai fafo, e lē o toe umi ae faatoʻilaloina Serbia, pe a faatusatusa atu i le malosi o Ausetalia-Hungary. Ae ui i lea, na sauniuni lelei Serbia, ma ina ua mavae ni taua i le 1914 (Feteʻenaʻiga o Cer, Feteʻenaʻiga o Kolubara
), o le leiloa ma le toe maua o Belgrade, ma le Serbian counter-offensive ma le nofoia o nisi Austrian teritori ma tele Serbian faitau aofai (i Syrmia ma sasaʻe Bosnia), o le Austro-Hungarian 'au na toe solomuli. Iā Iulai 5, 1914, na suia ai le tulaga o mea ina ua tuu atu e le tupu matua o Peter I ana tiute i le tupu na sosoo ai o Alesana, ma avea ai o ia ma sui pule.