Jund al-Urdunn
According to 9th-century historian al-Tabari, clashes between the Arab tribes of Palestine had begun in 790/91, while 15th-century Ibn Taghribirdi wrote that the conflict began as early as 787/88. The 12th-century Syriac Orthodox patriarch, Michael the Syrian and 13th-century historian Ibn al-Athir asserted that the conflict started in 792/93. According to the latter, hostilities commenced following an incident where a member of the northern Banu al-Qayn tribe came to grind his wheat at a location in the al-Balqa region of Transjordan and stole marrows and watermelons from a southern tribesman (either from the Banu Judham or Banu Lakhm tribes). Casualties became considerable as tribes from the Golan Heights and Jund al-Urdunn joined the war as allies of the Yamani coalition. The strife was brought to an end and violence calmed down by 29 December 793, after decisive intervention by the new caliph Harun al-Rashid and his brothers.