1 , ▁he ▁was ▁commission ed ▁Second ▁Lieutenant ▁in ▁the ▁United ▁States ▁Army ▁and ▁assigned ▁to ▁the ▁Four th ▁Infantry ▁for ▁duty . ▁He ▁was ▁subsequently ▁promoted ▁as ▁follows : ▁First ▁Lieutenant , ▁Four th ▁Infantry , ▁April ▁ 2 8 , ▁ 1 8 9 8 ; ▁Captain , ▁Squadron ▁Philipp ine ▁Caval ry , ▁April ▁ 2 3 , ▁ 1 9 0 0 ; ▁Captain , ▁Four th ▁Infantry , ▁February ▁ 2 , ▁ 1 9 0 1 ; ▁Major , ▁Tw enty - first ▁Infantry , ▁August ▁ 2 7 , ▁ 1 9 1 3 ; ▁Lieutenant ▁Colonel , ▁Six th ▁Infantry , ▁May ▁ 1 3 , ▁ 1 9 1 7 ; ▁Colonel , ▁Th irty - e ighth ▁Infantry , ▁August ▁ 5 , ▁ 1 9 1 7 ; ▁Brig ad ier ▁General , ▁N inth ▁Brigade , ▁April ▁ 1 2 , ▁ 1 9 1 8 . ▁He ▁attended ▁the ▁Infantry ▁and ▁Caval ry ▁School ▁in ▁ 1 8 9 5 , ▁and ▁was ▁in ▁the ▁War ▁College ▁in ▁ 1 9 1 5 . ▁ ▁Prior ▁to ▁World ▁War ▁I , ▁Cast ner ▁had ▁already ▁distinguished ▁himself . ▁While ▁a ▁Lieutenant , ▁he ▁participated ▁as ▁an ▁expl orer ▁in ▁the ▁Gl enn ▁Ex ped ition ▁in ▁Al aska . ▁In ▁the ▁Philippines , ▁for ▁his ▁services ▁with ▁the ▁Tag alog ▁Sc outs , ▁he ▁was ▁promoted ▁to ▁a ▁Captain cy ▁in ▁the ▁Philipp ine ▁Squadron ▁of ▁Caval ry , ▁which