Ramiro II
With the help of his new mercenary forces, Abd ar-Rahman launched a series of attacks on parts of the Iberian peninsula that had fallen away from Umayyad allegiance. In the 920s he campaigned against the areas that rebelled under Umar ibn Hafsun and refused to submit until the 920s. He conquered Mérida in 928–929, Ceuta in 931, and Toledo in 932. In 934 he began a campaign in the north against Ramiro II of Leon and Muhammad ibn Hashim al-Tujibi, the governor of Zaragoza. According to Ibn Hayyan, after inconclusively confronting al-Tujibi on the Ebro, Abd ar-Rahman briefly forced the Kingdom of Pamplona into submission, ravaged Castile and Alava, and met Ramiro II in an inconclusive battle. From 935 to 937, he confronted the Tujibids, defeating them in 937. In 939, Ramiro II defeated the combined Umayyad and Tujibid armies in the Battle of Simancas.