823 A band of Cordovan exiles from Alexandria effect the conquest of Crete. The king defeats his great-uncle, Abdallah. 832 Great defeat of the rebellious Toledans. 852 Death of Abd ar-Rahman. His son, =Muhammed I=, succeeds. The Christian monarchs are acknowledged lords paramount over Castile and Navarre. Revolts continue in many quarters. 862 Muhammed recovers Tudela and Saragossa after death of Musa, the head of the rebellious Beni Casi, but the latter, with the help of Alfonso III of Asturias and Leon, soon expel his soldiers. Ibn Merwan forms an independent state in the west. 886 Death of Muhammed. His son, =Mundhir=, succeeds. 888 Death of Mundhir. His brother, =Abdallah=, succeeds. 890 Defeat of Omar b. Hafsan, who for many years has maintained his independence with a large force in an impregnable fortress in Andalusia. Other serious risings in Elvira and Seville take place. 912 Death of Abdallah. His son, =Abd ar-Rahman III=, succeeds. He is the greatest of the Spanish caliphs, and his reign is the most brilliant period of the kingdom. He encourages the African Moslems to hold out against the Fatimites. 916 Ordoño II of Leon defeats army sent to avenge a raid he has made two years previously. 918 Brilliant victory of Abd ar-Rahman over Ordoño and Sancho I of Navarre. Abd ar-Rahman penetrates as far as Pamplona. 921 Ordoño invades the Moslem territory as far as Cordova. Defeat of Ordoño at battle of Val de Junquera. 923 Sancho captures Viguera. Death of Ordoño II enables Abd ar-Rahman to complete work of internal organisation. 929 Abd ar-Rahman assumes title of caliph. 934 Ramiro II of Leon, having restored peace in his kingdom, resumes war on the Moors. Defeat of the Moors at Simancas. 939 Great defeat of the Moors at Alhandega, but Ramiro is compelled to abandon operations against the Moors by his quarrel with the count of Castile. 950 The death of Ramiro enabling Abd ar-Rahman to win many victories. 960 The caliph restores the deposed Sancho I to the throne of Leon. 961 Death of Abd ar-Rahman. His son, =Al-Hakam II=, succeeds. He is a great book collector and patron of literature. The most notable event of his reign is the rise of Mohammed Ibn abi Amir. 976 Death of Al-Hakam. His ten-year-old son, =Hisham II=, after some opposition is established on the throne. The real power is in the hands of Ibn abi Amir, who reorganises the army. 981 Defeat of Ramiro III of Leon by Ibn abi Amir, who assumes the name of Almansor (Al-Mansur). 982 Bermudo II, Ramiro’s successor, pays tribute to Cordova. 986 Capture and sack of Barcelona, the capital of a Spanish fief, by Almansor.