 Al-Jadila in northern Syria remained Christian until the Muslim conquest of their region in 638.The Tayy were split during the First Fitna, with those based in Arabia and Iraq supporting Ali as caliph, and those in Syria supporting Mu'awiyah.The latter and his Umayyad kinsmen ultimately triumphed and members of the Tayy participated in the Umayyad conquest of Sindh in the early 8th century.