▁during ▁the ▁ 8 th ▁century . ▁ ▁The ▁al - F ih ri ▁were ▁originally ▁an ▁Arab ian ▁cl an ▁Ban u ▁F i hr ▁attached ▁to ▁the ▁Q ur ay sh , ▁the ▁tribe ▁of ▁the ▁Pro ph et . ▁ ▁Probably ▁the ▁most ▁ill ust ri ous ▁of ▁the ▁F i hr ids ▁was ▁O q ba ▁ibn ▁N af i ▁al - F ih ri , ▁the ▁Arab ▁Muslim ▁conquer or ▁of ▁North ▁Africa ▁in ▁ 6 7 0 - 6 8 0 s , ▁and ▁founder ▁of ▁K air ou an . ▁ ▁Several ▁of ▁his ▁sons ▁and ▁grands ons ▁participated ▁in ▁the ▁subsequent ▁con quest ▁of ▁His p ania ▁in ▁ 7 1 2 . ▁ ▁As ▁spe ar head s ▁of ▁the ▁western ▁con quest , ▁the ▁al - Fi hr is ▁were ▁probably ▁the ▁leading ▁arist ocr atic ▁Arab ▁family ▁of ▁If ri qi ya ▁and ▁Al - And alus ▁in ▁the ▁first ▁half ▁of ▁the ▁ 8 th ▁century . ▁They ▁produced ▁several ▁govern ors ▁and ▁military ▁leaders ▁of ▁those ▁provinces . ▁After ▁the ▁Ber ber ▁Revol t ▁of ▁ 7 4 0 - 4 1 , ▁the ▁west ▁fell ▁into ▁a ▁period ▁of ▁an archy ▁and ▁dis order . ▁The ▁Um ay y ad ▁C ali ph ▁in ▁Dam asc us , ▁facing ▁revol ts ▁in ▁Pers ia , ▁did ▁not ▁have ▁the ▁resources ▁to ▁re - im pose ▁their ▁authority ▁in ▁the ▁west . ▁In ▁the ▁vac u um , ▁the ▁F