Battle of Siffin

Ammar ibn Yasir (c. 567-657 CE) was among the earliest converts to Islam and the most severely persecuted, son of Sumayyah bint Khayyat, the first martyr of Islam. He governed Kufa under Umar and was killed at Siffin in 657 fighting for Ali ibn Abi Talib.

The Battle of Nahrawan (658 CE) was fought between Caliph Ali and the Kharijites who defected after the arbitration at Siffin. This battle marked the emergence of the Kharijite movement and led to Ali's assassination.

The Battle of Siffin (657 CE) was a major confrontation between Caliph Ali and Muawiyah that ended with controversial arbitration, marking a turning point that led to the emergence of the Kharijites and deepening sectarian divisions.

Founder and first caliph of the Umayyad Caliphate (602-680 CE), who served as governor of Syria for twenty years before establishing the first hereditary Islamic dynasty.