In 1054 Fernando I., a sagacious ruler of León and Castile, made a crusade against the Moors of Portugal, and brought the King of Toledo to his knees. He besieged Valencia and brought his troops into Andalusia. Under Alfonso VI., Toledo was recovered, amid the rejoicings of the Christian host, who anticipated a speedy delivery from the Morisco domination. The coming of Yussuf and his fierce Almoravides dashed the hopes of Alfonso's army. Finding themselves encompassed with growing dangers, the Moors of Spain begged the assistance of the powerful Almoravides. A conference of the Moorish rulers was held at Seville, and a message sent to Yussuf. The Almoravide King was astute. At first he displayed but little sympathy for his brethren in Spain. But the offer of Algeciras induced him to promise aid, and he came with a strong army of Moors and Berbers. Alfonso was informed that a profession of belief in the creed of Mahomet would spare him from certain death. The Christian sovereign replied by allying himself with Sancho of Navarre, and bringing a force to meet Yussuf. Between Badajoz and Merida the armies met in a terrible conflict. Alfonso was forced to retreat, and for the present Yussuf offered no further demonstration of his military skill. Next year the King of Morocco returned to Spain with his army, and exhorted the Moors of Andalusia to unite with him in a war of extinction. The petty sovereigns showed but little enthusiasm for a campaign. Probably they distrusted Yussuf's motives. Such suspicion was not without a basis, for when the Almoravides came for the third time, the monarch plainly stated that he purposed to annex all the remaining Mohammedan region. With a hundred thousand men, Yussuf took Seville and Granada. Alfonso came to the assistance of the Sevillians with a force of twenty thousand; but the Almoravides seized the city, and held it until the days of the Almohades in 1147. Alfonso then sought the alliance of France to assist his nation in expelling the African invaders. But the power of the Almoravides grew. Córdova was their seat of government, and Seville was one of their most important cities. The Moriscoes in Spain were no longer an independent race, but under the sway of Morocco. Motamid II. doubtless rued the hour when he sought aid from Yussuf. Fair Seville had passed out of his hands.