The Ummayad forces suffer a decisive defeat against the pro-Alid forces under Ibrahim ibn al-Ashtar in the battle of Khazir.

The Umayyad Caliphate or Umayyad Empire was the second caliphate established after the death of the Islamic prophet Muhammad and was ruled by the Umayyad dynasty. Uthman ibn Affan, the third of the Rashidun caliphs, was also a member of the clan. The family established dynastic, hereditary rule with Mu'awiya I, the long-time governor of Greater Syria, who became caliph after the end of the First Fitna in 661. After Mu'awiya's death in 680, conflicts over the succession resulted in the Second Fitna, and power eventually fell to Marwan I, from another branch of the clan. Syria remained the Umayyads' main power base thereafter, with Damascus as their capital.

Ibrahim ibn Malik al-Ashtar ibn al-Harith al-Nakha'i, better known as Ibrahim ibn al-Ashtar was an Arab commander who fought in the service of Caliph Ali and later served the pro-Alid leader al-Mukhtar al-Thaqafi. He led al-Mukhtar's forces to a decisive victory at the Battle of Khazir (686) against the Umayyads under Ubayd Allah ibn Ziyad, who was personally slain by Ibn al-Ashtar.

The Battle of Khazir took place in August 686 near the Khazir River in Mosul's eastern environs, in modern-day Iraq. The battle occurred during the Second Muslim Civil War and was part of the larger struggle for control of Iraq between the Syria-based Umayyad Caliphate, the Kufa-based pro-Alid forces of Mukhtar al-Thaqafi, and the Mecca-based caliphate of Abd Allah ibn al-Zubayr. It ended with the Umayyads being routed and the expansion of Mukhtar's rule into the region of Mosul.

August 6 is the 218th day of the year in the Gregorian calendar; 147 days remain until the end of the year.