A second call for help in 1088 makes Yusuf ibn Tashfin win the siege of Aledo and perceive the weakness of the Taifas, undecided between the alliance with the Almoravids or the Christians. His position of strength enables him to settle in al-Andalus in the third expedition he sends, this time without being required.[4]
The siege
Yusuf ibn Tashfin disembarked on June 10, 1090 and went directly to Toledo, as the first movement for the conquest of all Muslim territories. The Taifas, aware of the intentions of the Almoravid, did not support him in this campaign[5] and negotiations had already begun with Alfonso VI of Castile and Leon.[6]
The defenses of the city were prepared to withstand a long siege, and the garrison well prepared, and nearer were the Castles of Oreja and Maqueda. In the middle of July, Yusuf ibn Tashfin learned that a Castilian and Navarrese contingent led by Alfonso VI and Sancho I of Aragon were coming to the city, so he lifted the siege in August.[7]
Consequences
After verifying the lack of support he received from the Taifas, Yusuf ibn Tashfin attacked them, gaining control of the various Muslim kingdoms.[8] Thus, he deposes the ruler of Granada and places his cousin in his place as governor of the conquered Andalusian territories, with the mission of attacking and annexing new Taifas.[4] In 1090, the Almoravids took Malaga and Granada; in 1091, Almeria, Córdoba and Seville, Badajoz in 1094 and Valencia in 1102.[9]