Imam Ali is killed, bringing to an end the rule of the four "righteous caliphs": Abu Bakr, Umar, Uthman, and Ali. This also marks the beginning of the Umayyad rule. (jun 14, 661 – oct 14, 661)
Added to timeline:
Date:
jun 14, 661
oct 14, 661
~ 4 months and 2 days