The Kharijite rebellion refers to a series of uprisings that emerged among a sect of early Muslims, known as the Kharijites, who believed that true leadership should come from the community rather than hereditary succession. This group arose in the context of disputes over leadership following the assassination of the third caliph, Uthman, and the subsequent rise of Ali as the fourth caliph. The Kharijites rejected Ali's authority after his decision to negotiate with Muawiya, leading to conflicts that significantly impacted the early Islamic community.