Battle of Siffin
The Battle of Siffin (Arabic: معركة صفّين, romanized: Maʿraka Ṣiffīn) was fought in 657 CE (37 AH) between the Iraqi Arab forces of the fourth Rashidun caliph Ali ibn Abi Talib and the Syrian Arab forces of the rebelling long-time governor of the Levant, Mu'awiya ibn Abi Sufyan. The battle is named after its location Siffin on the banks of the Euphrates river.