▁De ▁S oto ▁Ex ped ition ▁also ▁encountered ▁numerous ▁C add o ▁villages . ▁Com posed ▁of ▁many ▁tribes , ▁the ▁C add o ▁were ▁organized ▁into ▁three ▁conf ed era cies , ▁the ▁Has ina i , ▁K ado had ach o , ▁and ▁N atch ito ches , ▁which ▁were ▁all ▁linked ▁by ▁similar ▁languages . ▁ ▁At ▁the ▁time ▁of ▁de ▁S oto ' s ▁visit , ▁the ▁C add o an ▁pe op les ▁occupied ▁a ▁large ▁territory . ▁It ▁included ▁what ▁is ▁now ▁Eastern ▁Oklahoma , ▁Western ▁Ark ansas , ▁N ortheast ▁Texas , ▁and ▁North west ▁Louisiana . ▁Arch ae olog ists ▁have ▁thought ▁that ▁the ▁C add o ▁and ▁related ▁pe op les ▁had ▁been ▁living ▁in ▁the ▁region ▁for ▁centuries ▁and ▁that ▁they ▁had ▁their ▁own ▁local ▁variant ▁of ▁Mississ ipp ian ▁culture . ▁ ▁Rec ent ▁exc av ations ▁have ▁revealed ▁within ▁that ▁region ▁more ▁cultural ▁divers ity ▁than ▁sch ol ars ▁had ▁expected . ▁The ▁sites ▁along ▁the ▁Ark ansas ▁River , ▁in ▁particular , ▁seem ▁to ▁have ▁their ▁own ▁distinct ive ▁characteristics . ▁Sch ol ars ▁still ▁class ify ▁the ▁Mississ ipp ian ▁sites ▁found ▁in ▁the ▁entire ▁C add o ▁area , ▁including ▁S pi ro ▁M ounds , ▁as ▁" C add o an ▁Mississ ipp ian ". ▁ ▁The ▁C add o an ▁Mississ ipp ian ▁region ▁contained ▁many ▁towns ▁in ▁addition ▁to ▁S pi ro , ▁including ▁the ▁Battle ▁M ound ▁Site . ▁Sch ol ars ▁have ▁determined