▁two ▁years ▁before ▁transfer ring ▁to ▁the ▁United ▁States ▁Military ▁Academy . ▁ ▁He ▁graduated ▁in ▁ 1 9 2 5 , ▁received ▁a ▁commission ▁as ▁a ▁Second ▁Lieutenant ▁in ▁the ▁Field ▁Art illery ▁branch , ▁and ▁was ▁initially ▁assigned ▁to ▁Fort ▁D . A . ▁Russell , ▁Wy oming . ▁ ▁In ▁ 1 9 2 7 ▁C annon ▁completed ▁the ▁Army ▁Air ▁Corps ▁Primary ▁F lying ▁School . ▁ ▁C annon ▁attended ▁the ▁B atter y ▁Offic ers ▁Cour se ▁in ▁ 1 9 3 1 . ▁ ▁In ▁ 1 9 3 8 ▁C annon ▁graduated ▁from ▁the ▁Army ▁Command ▁and ▁General ▁Staff ▁College . ▁ ▁Prior ▁to ▁World ▁War ▁II ▁C annon ▁served ▁as ▁an ▁instruct or ▁at ▁the ▁Army ' s ▁Fort ▁S ill , ▁Oklahoma ▁Field ▁Art illery ▁School . ▁ ▁World ▁War ▁II ▁ ▁In ▁World ▁War ▁II ▁C annon ▁served ▁in ▁the ▁China - B ur ma - Ind ia ▁Theater , ▁adv ancing ▁to ▁brig ad ier ▁general ▁and ▁chief ▁of ▁staff ▁for ▁the ▁Northern ▁Com bat ▁Area ▁Command . ▁ ▁Post ▁World ▁War ▁II ▁After ▁World ▁War ▁II ▁C annon ▁served ▁as ▁chairman ▁of ▁an ▁Army ▁board ▁which ▁interview ed ▁and ▁made ▁recommend ations ▁on ▁applic ants ▁for ▁comm issions ▁as ▁officers . ▁ ▁He ▁also ▁served ▁as ▁Ass istant ▁Chief ▁of ▁Staff ▁for ▁Log istics , ▁G - 4 ▁for ▁Six th ▁United ▁States ▁Army . ▁ ▁In ▁ 1 9 4 8 ▁C annon ▁attended ▁the ▁Basic ▁Air bor ne ▁Cour