Yazid I
ʿUbayd Allāh ibn Ziyād () was the Umayyad governor of Basra, Kufa and Khurasan during the reigns of caliphs Mu'awiya I and Yazid I, and the leading general of the Umayyad army under caliphs Marwan I and Abd al-Malik. Ubayd Allah is primarily remembered for his role in the killings of members of Ali ibn Abi Talib's family including Husayn ibn Ali, and he has become infamous in Muslim tradition.