عبد الله بن الزبير
After Mu'awiya's death in 680, the Muslim empire fell to civil war. Denouncing the new caliph Yazid, the Qurayshi leader Abd Allah ibn al-Zubayr established himself in the sanctuary of Mecca. When Yazid sent an army to end the rebellion in 683 and Mecca was besieged, Kharijites assisted Abd Allah ibn al-Zubayr in defending the city. However, Yazid died in November 683 and Ibn al-Zubayr proclaimed himself caliph. Kharijites, after discovering that Ibn al-Zubayr had proclaimed caliphate and did not share their view of Uthman and condemned his murder, abandoned him. Some of them went to Yamama, in cental Arabia, under the leadership of Abu Talut, whereas the majority went to Basra. In the meantime, Basran tribal chiefs expelled Ibn Ziyad and the city fell to tribal warfare. Kharijites, under the leadership of Nafi ibn al-Azraq, took over the city, killed the deputy appointed by Ibn Ziyad and broke 140 of their comrades free from Ibn Ziyad's prison. Soon afterwards, Basrans recognized Ibn al-Zubayr and he appointed Umar ibn Ubayd Allah ibn Ma'mar his governor there. Umar drove Kharijites out of Basra and they escaped to Ahwaz. Doctrinal differences between Nafi and Najda ibn Amir al-Hanafi, another of the leaders, led to a split within the group.