WThe Abbasid invasion of Asia Minor in 782 was one of the largest operations launched by the Abbasid Caliphate against the Byzantine Empire. The invasion was launched as a display of Abbasid military might in the aftermath of a series of Byzantine successes. Commanded by the Abbasid heir-apparent, the future Harun al-Rashid, the Abbasid army reached as far as Chrysopolis, across the Bosporus from the Byzantine capital, Constantinople, while secondary forces raided western Asia Minor and defeated the Byzantine forces there. As Harun did not intend to assault Constantinople and lacked ships to do so, he turned back.
WAn Abbasid–Carolingian alliance was attempted during the 8th to 9th century through a series of embassies, rapprochements and combined military operations between the Frankish Carolingian Empire and the Abbasid Caliphate and pro-Abbasid rulers in Al Andalus.
WThe Battle of Fakhkh was fought on 11 June 786 between the forces of the Abbasid Caliphate and the supporters of a pro-Alid rebellion in Mecca under al-Husayn ibn Ali, a descendant of Hasan ibn Ali.
WThe Battle of Kopidnadon or Kopidnados took place in September 788 between the armies of the Abbasid Caliphate and the Byzantine Empire. The Abbasid army launched an invasion of Byzantine Asia Minor, and was confronted by a Byzantine force at Kopidnadon. The resulting battle was an Abbasid victory. Among the Byzantine losses was a certain Diogenes, who is identified by some scholars with the probable original source for the literary hero Digenes Akritas.
WAbu Muhammad Musa ibn Mahdi al-Hadi was the fourth Abbasid caliph who succeeded his father Al-Mahdi and ruled from 169 AH until his death in 170 AH. His short reign ended with internal chaos and power struggles with his mother.
WThe siege of Kamacha by the Abbasid Caliphate took place in autumn 766, and involved the siege of the strategically important Byzantine fortress of Kamacha on the eastern bank of the Euphrates River, as well as a large-scale raid across eastern Cappadocia by a part of the Abbasid invasion army. Both enterprises failed, with the siege dragging on into winter before being abandoned and the raiding force being surrounded and heavily defeated by the Byzantines. The campaign was one of the first large-scale Abbasid operations against Byzantium, and is one of the few campaigns of the Arab–Byzantine wars for which detailed information survives, although it is barely mentioned in Arabic or in Byzantine sources.
WThe Principality of Chaghaniyan, known in Arabic sources as al-Saghaniyan, was a part of the Hephthalite Confederation from the 5th to the 7th century CE. After this, it was ruled by a local, presumably Iranian dynasty, which governed the Chaghaniyan region from the late 7th-century to the early 8th-century CE. These rulers were known by their titles of “Chaghan Khudah”.