▁military ▁experience . ▁ ▁On ▁ 1 2 ▁June ▁ 1 8 3 3 , ▁Governor ▁Pope ▁appointed ▁William ▁Field ▁to ▁serve ▁as ▁adj ut ant ▁general . ▁ ▁T ensions ▁with ▁Mexico ▁Next ▁to ▁the ▁Indians , ▁the ▁Ark ans ans ▁were ▁most ▁fear ful ▁of ▁their ▁Mexican ▁neighb ors ▁in ▁Texas . ▁Much ▁of ▁this ▁trouble ▁was ▁caused ▁by ▁an ▁ill - defined ▁boundary ▁between ▁Ark ansas ▁and ▁Texas . ▁The ▁International ▁B ound ary ▁between ▁the ▁Ark ansas ▁Territ ory ▁of ▁the ▁United ▁States ▁and ▁the ▁Mexican ▁state ▁of ▁Co ahu ila ▁and ▁Texas ▁had ▁been ▁defined ▁in ▁the ▁treat y ▁of ▁ 1 8 1 9 ▁between ▁the ▁United ▁States ▁and ▁Spain , ▁but ▁remained ▁un sur vey ed ▁in ▁ 1 8 2 7 . ▁Because ▁the ▁location ▁of ▁the ▁border ▁was ▁uncertain , ▁the ▁ownership ▁of ▁a ▁considerable ▁area ▁south west ▁of ▁Red ▁River ▁was ▁in ▁question . ▁Ark ansas ▁Territ ory ▁had , ▁since ▁ 1 8 2 0 , ▁exerc ised ▁juris diction ▁over ▁the ▁settlement s ▁immediately ▁south ▁of ▁the ▁river , ▁holding ▁them ▁to ▁be ▁a ▁part ▁of ▁Miller ▁County . ▁In ▁ 1 8 2 7 ▁the ▁eastern most ▁portion ▁of ▁the ▁disput ed ▁area , ▁approxim ating ▁the ▁present ▁corner ▁of ▁Ark ansas ▁south west ▁of ▁the ▁river , ▁was ▁assigned ▁by ▁the ▁territorial ▁legisl ature ▁to ▁the ▁new ▁county ▁of ▁La f ay ette . ▁In ▁ 1 8 2 8 ▁Miller ▁County ▁north ▁of ▁the ▁river ▁was ▁abol ished