Battle of Fraga The Battle of Fraga was a battle of the Spanish Reconquista that took place in 1134 at Fraga , Spain . The battle was fought between the forces of the Kingdom of Aragon , commanded by Alfonso the Battler and a variety of Almohad forces that had come to the aid of the town of Fraga which was being besieged by King Alfonso I . The battle resulted in an Almoravid victory . The Aragonese monarch Alfonso I died shortly after the battle . Context . Since the second half of the 11th century , the kings of Aragón and the counts of Barcelona and of Urgel tried with obstinacy to conquer the Muslim held towns and frontier fortresses of the Marca Superior . Specifically , they targeted the low lands around the Segre and Cinca Rivers all the way to the mouth of the Ebro , an active and prosperous region with direct access to the Mediterranean Sea . The most important towns in this region were Lleida , Mequinenza , Fraga , and Tortosa . The region was rich in commerce and had a very productive agricultural system . It also was a region that was constantly plagued by warfare throughout this period . For this reason , the land is dotted with many fortresses , towers and even subterranean refuges where people would hide from attack . The Battle . In October of 1134 , King Alfonso I of Aragon " the Battler " , known by the Muslims as " Ibn Rudmir " ( literally " son of Ramiro ) or " al - Farandji " , laid siege to the town of Fraga with an army from Aragon . The Almoravid response was swift and decisive . The Emir of Cordoba , son of the caliph , equipped a force of 2 , 000 knights , the Enur if Murcia and Valencia put together 500 knights and the governor of Lleida another 200 . Once these forces were joined together , they marched to the relief of Fraga . Alfonso I " the Battler " , conscious of his numerical advantage , took the Muslim force for granted : " Id a recibir el regalo que nos traen estos infieles " . The Muslim force was led by the governor of Lérida , Ibn ‘ Iyad . The Christian forces broke under the charge of the Almoravid cavalry , however Alfonso I , still confident in his numerical and tactical advantage , rallied his troops . His entourage clashed with the cavalry of the emir of Murcia , Yahya ben Ghaniya . The Almoravid cavalry decimated the Aragonese soldiers . Upon seeing this , the townspeople , most of whom were of Arab origin , exited the city and fell upon the Aragonese camp pillaging and killing a majority of the soldiers there . They made off with all of the Aragonese army ' s provisions and took them back into the city of Fraga . At this moment , the emir of Cordoba launched a final attack stroke with his cavalry and broke the Christian troops once again . Having lost a majority of his soldiers , Alfonso I " the Battler " was obliged to flee and made for Zaragoza . He would die a mere 20 days after the battle . Casualties and Aftermath . The Aragonese toll at Fraga was significant . Amongst the dead or captured were many notable members of Aragonese society . Guy of Lescar fought with the Christian forces . He was captured by the Almoravid forces and imprisoned at Balensiyya . Aside from the king , the following notable Aragonese knights were killed at Fraga :