▁of ▁the ▁I ber ian ▁Pen ins ula , ▁the ▁Kingdom ▁of ▁Arag on ▁took ▁Barb astro ▁from ▁the ▁Hud id ▁Ta ifa ▁of ▁L ér ida ▁as ▁part ▁of ▁an ▁international ▁expedition ▁san ction ed ▁by ▁Pope ▁Alexander ▁II . ▁Most ▁crit ically , ▁Alfonso ▁VI ▁of ▁León - Cast ile ▁conquer ed ▁To led o ▁and ▁its ▁wider ▁ta ifa ▁in ▁ 1 0 8 5 , ▁in ▁what ▁it ▁was ▁seen ▁as ▁a ▁critical ▁event ▁at ▁the ▁time , ▁ent ail ing ▁also ▁a ▁huge ▁territorial ▁expansion , ▁adv ancing ▁from ▁the ▁S istema ▁Central ▁to ▁La ▁Man cha . ▁In ▁ 1 0 8 6 , ▁following ▁the ▁sie ge ▁of ▁Zar ago za ▁by ▁Alfonso ▁VI ▁of ▁León - Cast ile , ▁the ▁Al mor av ids , ▁religious ▁ze al ots ▁originally ▁from ▁the ▁desert s ▁of ▁the ▁Mag h reb , ▁land ed ▁in ▁the ▁I ber ian ▁Pen ins ula , ▁and , ▁having ▁inf lic ted ▁a ▁serious ▁defeat ▁to ▁Alfonso ▁VI ▁at ▁the ▁battle ▁of ▁Z al aca , ▁began ▁to ▁se ize ▁control ▁of ▁the ▁remaining ▁ta if as . ▁ ▁The ▁Al mor av ids ▁in ▁the ▁I ber ian ▁pen ins ula ▁progress ively ▁relax ed ▁strict ▁observ ance ▁of ▁their ▁faith , ▁and ▁treated ▁both ▁Jews ▁and ▁Moz ar abs ▁har sh ly , ▁facing ▁u pr is ings ▁across ▁the ▁pen ins ula , ▁initially ▁in ▁the ▁Western ▁part . ▁The ▁Al m oh ads , ▁another ▁North