The Battle of the Camel (Jamal) was the first civil war within the Islamic community. It took place after Imam 'Ali b. Abi Talib was given bay'a - the oath of allegiance - to be the caliph of the Muslims after the murder of 'Uthman b. 'Affan.
'Aisha, one of the wives of the Prophet Muhammad (s), joined two of his prominent Companions Talha b. 'Ubaydullah and Zubayr b. al-'Awwam, who all together came into battle with their supporters against 'Ali and his supporters. One of 'Ali's supporters was Muhammad b. Abi Bakr, who was none other than the brother of 'Aisha and a son of Abu Bakr b. Abi Quhafa who had taken the position of caliphate after the demise of the Prophet (s) in a maneuver that can only be described as a coup against 'Ali.
A large number of Muslims were killed but finally 'Ali and his supporters prevailed. They showed exemplary courtesy towards 'Aisha, and 'Ali asked her own brother to escort her back to Medina.
That was a defining moment for the Islamic community and its reverberations are felt to this day in how early Islamic history is narrated and interpreted.
You can read more about it here - https://www.al-islam.org/caliphate-imamate-ahmad-namaee/rebellion-agains...