▁banks ▁of ▁the ▁river ▁Aut ra ▁( O dra ). ▁ ▁They ▁also ▁gained ▁an ▁out let ▁to ▁the ▁sea ▁by ▁se izing ▁from ▁the ▁Aqu itan ian - spe aking ▁Car ist ii ▁further ▁east ▁the ▁coast al ▁high land ▁region ▁between ▁the ▁rivers ▁As ón ▁and ▁N er ou a ▁( N er vi ón ), ▁in ▁the ▁modern ▁eastern ▁Cant ab ria , ▁V iz c aya , ▁and ▁Á lava ▁Bas que ▁provinces . ▁ ▁However , ▁the ▁Aut rig ones ’ ▁hold ▁to ▁this ▁vast ▁territory ▁was ▁not ▁meant ▁to ▁last ; ▁some ▁time ▁after ▁ 3 0 0 ▁BC ▁they ▁were ▁driven ▁out ▁from ▁southern ▁Aut rig onia ▁– ▁the ▁western ▁Burg os ▁region ▁– ▁by ▁the ▁Tur mod igi ▁al lied ▁with ▁the ▁V ac ce i , ▁who ▁seized ▁the ▁Aut rig ones ’ ▁early ▁capital ▁Aut rac a . ▁ ▁Th rust ▁back ▁to ▁their ▁lands ▁on ▁the ▁mountain ▁ranges ▁of ▁the ▁upper ▁E bro ▁north ▁of ▁the ▁Ar l anz ón ▁valley ▁around ▁the ▁ 3 rd - 2 nd ▁Cent uries ▁BC , ▁the ▁Aut rig ones ▁al lied ▁themselves ▁with ▁the ▁Ber ones ▁and ▁evol ved ▁into ▁a ▁trib al ▁society ▁similar ▁to ▁the ▁pe op les ▁of ▁the ▁north - west . ▁ ▁By ▁the ▁ 1 st ▁century ▁BC , ▁they ▁were ▁organized ▁into ▁a ▁feder ation ▁of ▁ten ▁autonom ous ▁mountain - top ▁fort ified ▁towns ▁( C iv it ates ), ▁chief ly ▁among ▁them ▁their ▁new