The Umayyad Dynasty (661-750 CE), the first dynasty to take the title of Caliphate, was established in 661 CE by Muawiya (l. c. 602-680 CE), who had served as the governor of Syria under the Rashidun Caliphate, after the death of the fourth caliph, Ali in 661 CE. The Umayyads ruled effectively and firmly established the political authority of the Caliphate, rebellions were crushed with brute force, and no quarter was given to those who stirred uprisings.
This is a companion discussion topic for the original content at https://www.worldhistory.org/Umayyad_Dynasty/.