Ubayd Allah's father prepared Ziyad to succeed him as governor, and indeed, after Ziyad's death in 672/673, Ubayd Allah became governor of Khurasan [REF].
Mu'awiya died in 680 and was succeeded by his son Yazid I. Mu'awiya's designation of his son was an unprecedented act and shocked many in the Muslim community, particularly the Arab nobility of Kufa [REF].