▁Army ▁as ▁a ▁volunte er ▁on ▁ 1 ▁April ▁ 1 9 1 0 , ▁and ▁fought ▁in ▁the ▁B alk an ▁Wars ▁of ▁ 1 9 1 2 – 1 9 1 3 . ▁He ▁entered ▁the ▁N CO ▁Academy ▁and ▁graduated ▁in ▁March ▁ 1 9 1 4 ▁as ▁an ▁Infantry ▁Second ▁Lieutenant . ▁During ▁World ▁War ▁I , ▁he ▁served ▁in ▁the ▁Mac ed onian ▁front , ▁being ▁promoted ▁to ▁lieutenant ▁in ▁ 1 9 1 7 ▁and ▁acting ▁as ▁a ▁company ▁commander ▁during ▁the ▁ 1 9 1 8 ▁Al lied ▁off ensive . ▁In ▁ 1 9 1 9 ▁he ▁was ▁promoted ▁to ▁major , ▁and ▁fought ▁as ▁batt alion ▁commander ▁and ▁CO ▁of ▁the ▁ 2 3 rd ▁Regiment ▁in ▁the ▁Asia ▁Minor ▁Camp aign ▁of ▁ 1 9 1 9 – 1 9 2 2 . ▁ ▁In ▁late ▁ 1 9 2 2 ▁he ▁was ▁appointed ▁as ▁chief ▁of ▁staff ▁of ▁the ▁ 7 th ▁Infantry ▁Division , ▁and ▁was ▁promoted ▁to ▁lieutenant ▁colon el ▁in ▁ 1 9 2 3 . ▁He ▁then ▁served ▁as ▁CO ▁of ▁the ▁ 1 st ▁and ▁ 4 1 st ▁Infantry ▁Reg iments . ▁In ▁ 1 9 3 0 ▁he ▁was ▁promoted ▁to ▁full ▁colon el , ▁serving ▁as ▁military ▁attach é ▁to ▁Y ug oslav ia ▁and ▁Czech oslov ak ia , ▁Director ▁of ▁the ▁General ▁Staff ' s ▁Second ▁Bureau ▁( Int elligence ) ▁and ▁as ▁Deput y ▁Command ant ▁of ▁the ▁War ▁College .