ah man ▁kept ▁only ▁the ▁strong holds ▁of ▁Ce uta ▁and ▁Tang iers . ▁ ▁War ▁with ▁the ▁Christian ▁kingdom s ▁of ▁the ▁north ▁Even ▁before ▁al - And alus ▁was ▁firm ly ▁under ▁his ▁rule , ▁he ▁had ▁restart ed ▁the ▁war ▁against ▁King ▁Or do ño   II ▁of ▁León , ▁who ▁had ▁taken ▁advantage ▁of ▁the ▁previous ▁troubles ome ▁situation ▁to ▁capture ▁some ▁boundary ▁areas ▁and ▁men ace ▁the ▁Um ay y ad ▁territory . ▁In ▁ 9 1 7 ▁the ▁then ▁em ir ▁had ▁sent ▁a ▁large ▁army ▁under ▁his ▁general ▁A hm ad ▁ibn ▁Ab i ▁Ab da ▁against ▁León , ▁but ▁this ▁force ▁was ▁destroyed ▁at ▁the ▁Battle ▁of ▁San ▁Est eb an ▁de ▁G orm az ▁in ▁September ▁of ▁that ▁year . ▁ ▁Rec ogn izing ▁he ▁had ▁under est im ated ▁the ▁power ▁of ▁Or do ño   II , ▁in ▁ 9 2 0 ▁Abd ▁al - R ah man ▁must ered ▁another ▁powerful ▁army ▁to ▁rec laim ▁the ▁territ ories ▁lost ▁after ▁the ▁previous ▁campaign . ▁He ▁captured ▁the ▁for ts ▁of ▁Os ma ▁and ▁San ▁Est eb an ▁de ▁G orm az . ▁After ▁defe ating ▁King ▁San cho ▁Garc és ▁I ▁of ▁Navar re ▁and ▁the ▁king ▁of ▁León ▁at ▁Val de j un qu era ▁on ▁ 2 6 ▁July , ▁he ▁pen etr ated ▁into ▁Navar re , ▁over coming ▁Arag on ▁by ▁the ▁classic ▁route ▁of ▁the ▁invas ions ▁from ▁the ▁south . ▁Abd ▁al - R ah