Which war Hazrat Ali fought against gennes?

Hazrat Ali fought against the forces of Muawiya ibn Abi Sufyan during the First Fitna, a civil war in early Islam that took place after the assassination of the caliph Uthman. This conflict included the famous Battle of Siffin in 657 CE, where Ali's forces clashed with those loyal to Muawiya. The war was characterized by political and theological disputes over leadership in the Muslim community. Ultimately, it marked a significant struggle for power that led to the eventual split between Sunni and Shia Islam.