<prompt> Bhala okuqhubekayo kwalesi sigaba - Impi Yezwe I yaqala lapho i-Austria-Hungary imemezela impi neSerbia ngoJulayi 28, 1914. I-SAF i-Serbian Air Force yaqala ukusebenza kusukela ngosuku lokuqala. Ekuqaleni kweMpi Yezwe I, abashayeli bezindiza baseSerbia ababenekhono futhi benolwazi lwezimpi zaseBalkan babephumelele ekunikezeni ukwaziswa okubalulekile ngenani, ukunyakaza, nesimo samabutho esitha. Bafaka isandla ekunqobeni kokuqala kwamaSerbia ngo-1914 eCer Mountain, eKolubara  <response>: nomfula iDrina. Ekuqaleni kuka-1915, behlome ngezibhamu ezinemishini namabhomu, abashayeli bezindiza baseSerbia baphumelela ekulweni nesitha ngokuhlasela izindiza zabo ezazindiza phezu kwendawo enobukhosi yaseSerbia noma ngokuqhumisa amabhomu ezindaweni ezibalulekile ezingemuva. 