Answer
Ruling from April 680 to November 683, Yazid I's reign marked a turbulent period in the Umayyad Caliphate's history. He inherited the caliphate after his father Muawiyah I, and faced significant challenges, including the Second Fitna, a civil war that threatened the unity of the Muslim world. Despite these struggles, Yazid was a capable ruler who managed to maintain the caliphate's control over its vast territories.