What role did king bans if Brittany and king bors of gaul play in the rebellion against arthur?

King Bors of Gaul and King Ban of Brittany were significant figures in the rebellion against King Arthur in Arthurian legend. Both kings were initially loyal to Arthur but became disillusioned due to his decisions and the growing tensions within his court. Their support for the rebellion was partly driven by their desire to protect their own realms and uphold their honor. Ultimately, their actions contributed to the fragmentation of Arthur's kingdom and the challenges he faced in maintaining his rule.