In this world, the Christian militia in Asturias, one of two the final Christian states in Iberia, is defeated at the Battle of Covadonga, and the peninsula is promptly reorganized into the Emirate of al-Andalus, independent of the caliphate in order to maintain greater order in the ever expanding Muslim world. From then on, the Islamic states under a variety of names and rulers are able to penetrate deep into Europe and other areas of the world to convert around 60% of the population, drastically altering the world as we know it.
722 CE: The Point of Divergence
Main article: Timeline 722 - 1000 (Umayyad World)
Umayyad armies under the leadership of Al Qama (a Moorish commander) are able to wrestle control of the mountains in central Asturias from the forces of Pelagius, ruler of the region, and force a surrender, bringing all of Iberia under the united leadership of the Umayyad Caliphate. Following the victory, Anbasa ibn Suhaym al-Kalbi, the governor of al-Andalus, was given full authority over the region to more efficiently run the area due to its distance from Damascus. In turn, this allowed caliph Yazid II to more smoothly govern the Maghreb and stop uprisings, and paved the way for greater Islamic expansions in both the east and west.
After this major victory for the Islamic world, Al Qama is able to capture the Kingdom of the Basques in 723 and then set his sights toward Gaul, capturing much of Aquitaine before his death in 729 at the Battle of Tours, which his armies continued to fight and eventually win under new leadership. After the total absorption of Aquitaine in 733, the Christian world assembled a Holy Alliance to halt Islamic expansion in Europe and preserve Christianity.