his subjects of Muslim Arab heritage, and those of Muslim Berber heritage. Hasdai ibn Shaprut, a Jewish courtier in the king's court who served as financier to the king, wrote of the king's revenues: Early rule During the first 20 years of his rule, Abd al-Rahman avoided military action against the northern Christian kingdoms, Asturias and the Kingdom of Navarre. The Muwallad rebels were the first problem he confronted. Those powerful families were supported by Iberians who were openly or secretly Christians and had acted with the rebels. These elements, which formed the bulk of the population, were not averse to supporting a strong ruler who would protect them against the Arab aristocracy. Abd al-Rahman moved to subdue them by means of a mercenary army that included Christians. He first had to suppress the rebel Umar ibn Hafsun. On 1 January 913 an army, led by the eunuch Badr, conquered the fortress of Écija, at some from the capital. All the city's fortifications were destroyed, aside from the citadel, which was left as the residence of the governor and a garrison for the emirati troops. In the following spring, after sixty-five days of meticulous preparations, Abd al-Rahman personally led an expedition to the south of his realm. His troops were able to recover the coras (provinces) of Jaén and Granada, while a cavalry detachment was sent to free Málaga from ibn Hafsun's siege. He also obtained the capitulation of Fiñana (in the modern province of Almería), after setting fire to its suburbs. Subsequently, he moved against the castle of Juviles in the Alpujarras. After devastating the surrounding countryside to deprive the castle of any resources, he encircled it. Finding it difficult to bombard with catapults, he ordered the construction of a platform where his siege engines could be mounted to greater effect, and cut the water supply. The Muwallad defenders surrendered after a few days: their lives, apart from fifty-five die-hards who were beheaded, were spared in exchange for their allegiance to the emir. The campaign continued in a similar vein, lasting for a total of ninety days. Abd al-Rahman forced the defeated Muwallad to send hostages and treasures to Córdoba, in order to secure their continued submission. During the first year of his reign, Abd al-Rahman took advantage of the rivalries between the Banu Hajjaj lords of Seville and Carmona to force them to submit. He initially sent a