What role did King Bans of Brittany and King Bors of Gaul play in the rebellion against Arthur?

King Bans of Brittany and King Bors of Gaul were key figures in the rebellion against King Arthur in the Arthurian legends. They initially supported Arthur but later joined forces with other discontented kings and nobles who opposed his rule, primarily due to grievances over Arthur's governance and his increasing power. Their rebellion is often depicted as a challenge to Arthur's authority, highlighting the tensions among the noble houses of Britain and the complexities of loyalty during his reign. Ultimately, their actions contribute to the larger narrative of conflict and division within Arthur's kingdom.