al-Jarrah ibn Abd Allah al-Hakami

Al-Jarrah ibn Abd Allah al-Hakami (died ca. 112 AH / 730 CE) was an Umayyad military commander and governor who served in Khorasan and Azerbaijan during the caliphate of Hisham ibn Abd al-Malik. He was from the Hakami branch of the Himyarite tribes and rose through Umayyad military service to command significant operations on the eastern and Caucasian frontiers.

He served as governor of Khorasan during a critical period of the Umayyad expansion into Central Asia and the Caucasus. His campaigns in the Caucasus — particularly against the Khazar Khaganate, the powerful Turkic federation north of the Caucasus mountains — became among the most important and ultimately fatal of the Umayyad eastern campaigns.

He suffered a catastrophic defeat against the Khazars in the Battle of Marj Ardabil in 112 AH / 730 CE — one of the worst military disasters of the Umayyad period. He was killed in that battle along with much of his army. The Khazar victory was so complete that it temporarily halted the northward Islamic expansion and shocked the Umayyad court. Caliph Hisham ibn Abd al-Malik had to dispatch Maslamah ibn Abd al-Malik with a large army to stabilize the Caucasian front.

Al-Jarrah ibn Abd Allah's defeat and death at the hands of the Khazars marked the effective limit of Umayyad expansion into the Caucasus. His career illustrates both the reach and the overextension of Umayyad military ambition in the late period of the dynasty.