Hussein Ibn Ali - Yazid's Rule

Yazid's Rule

One of the important points of the treaty made between Hasan and Muawiyah was that Muawiyah will not designate anyone as his successor after his death and the decision will be left to the Ummah (the Nation). But after the death of Hasan, he, thinking that no one will be courageous enough to object his decision as the Caliph, designated his son, Yazid I, as his successor in 680 CE, literally breaking the treaty.