Rubuta ci gaba don wannan sakin layi - An haifi Dragiša Vasić a Gornji Milanovac, Masarautar Serbia a ranar 2 ga Satumba, 1885. Ya gama makarantar firamare da makarantar motsa jiki a cikin garin kafin ya koma Belgrade don yin karatun doka. Tsakanin 1912 da 1913, ya yi yaƙi a Yaƙe-yaƙe na Balkan a matsayin jami'in ajiya a cikin Sojojin Serbia kuma ya halarci Yaƙin Kumanovo da Yaƙin Bregalnica. Ya ci gaba da aiki tare da Sojojin Serbia a lokacin Yaƙin Duniya na ɗaya kuma ya yi yaƙi a Yaƙin Kolubara
a watan Nuwamba da Disamba na shekara ta 1914. Ya koma baya tare da sojojin Serbia ta hanyar Albania a lokacin hunturu na 1915 da 1916 kuma ya sauka a tsibirin Girka na Corfu, daga inda aka tura shi zuwa Salonika Front. A shekara ta 1917, ya zama abin takaici tare da daular Karađorđević bayan shari'ar Salonika, inda aka yanke wa dan uwan Vasić, Ljubomir Vulović, hukuncin kisa kuma aka kashe shi saboda kasancewa memba na Black Hand.