Stojsavljevic was born to an ethnically mixed marriage in
Innsbruck, his father being a
Serb from
Velika Popina in
Croatia, his mother, Adelheid Hohenauer, being
Austrian. His elder sister
Mileva became a noted artist. He attended a military middle school before he graduated from the
Theresian Military Academy on 18 August 1908 and commissioned a leutnant in
Feldjaegerbataillon No. 21. By 1911, in addition to his duties as a company officer, he was a corps ski instructor. In 1913, he transferred into aviation. On 13 April, he began pilot's training. The First of May brought a promotion to Oberleutnant. On 2 July, he qualified as a pilot with Austrian certificate 114. On 14 October 1913, he participated in the first flight over the Alps from Vienna to
Gorizia. Stojsavljevic's appointment as a field pilot followed on 7 April 1914. On outbreak of war, he was in Flik 1, stationed on the northeastern front in
Galicia. ==World War I==