sentences:  Having successfully completed a year's military service, Arz sat and passed the reserve officers examination and went on to apply for and successfully obtain a commission as a regular officer.In 1878, he was commissioned with the rank "Leutnant".Attaining the rank of "Oberleutnant", Arz attended the Imperial Kriegschule in Vienna, 1885–1887, where he again distinguished himself, and in 1888 he was appointed to the General Staff.