▁the ▁king ' s ▁men . ▁Before ▁Ab u ▁Y us uf ▁the ▁reb els ▁accused ▁Alfonso ▁X ▁of ▁deb asing ▁the ▁coin age , ▁viol ating ▁their ▁custom ary ▁privileges , ▁causing ▁infl ation ▁and ▁favour ing ▁mer ch ants . ▁Ab u ▁Y us uf ▁encourag ed ▁Nu ño ▁to ▁send ▁his ▁son ▁Nu ño ▁to ▁him ▁in ▁Mor oc co , ▁where ▁he ▁promised ▁to ▁make ▁the ▁younger ▁Nu ño ▁" king " ▁of ▁the ▁Christians , ▁that ▁is , ▁commander ▁of ▁the ▁Christian ▁milit ia ▁he ▁had ▁raised . ▁ ▁Before ▁the ▁end ▁of ▁ 1 2 7 2 , ▁Nu ño ▁and ▁several ▁other ▁re bel ▁leaders ▁had ▁paid ▁hom age ▁and ▁sw ore ▁fe alty ▁to ▁I bn ▁al - Ah mar ▁of ▁Gran ada . ▁Their ▁stated ▁aim ▁was ▁to ▁restore ▁the ▁Tre aty ▁of ▁Al cal á ▁de ▁Ben za ide ▁and ▁the ▁Portuguese ▁t ribute . ▁Despite ▁the ▁clear ▁evidence ▁of ▁tre ason , ▁the ▁nobles ▁participated ▁in ▁the ▁cort es ▁that ▁conven ed ▁in ▁Burg os ▁in ▁November . ▁Alfonso ▁granted ▁some ▁con cess ions , ▁but ▁not ▁enough ▁to ▁satisfy ▁the ▁reb els . ▁Nu ño ▁and ▁the ▁other ▁ring le aders ▁determined ▁to ▁go ▁into ▁ex ile ▁in ▁Gran ada , ▁but ▁not ▁without ▁pl und ering ▁the ▁kingdom ▁as ▁they ▁went . ▁Nu ño ' s ▁sons ▁joined ▁him ▁in ▁ex ile . ▁Upon ▁their ▁arrival ▁in ▁Gran ada , ▁I bn ▁al - Ah mar ▁sent ▁the ▁Cast ili