780-790
Summary: eastern Byzantum declines under the ineffective rule of Irene, who reimposes icon-worship; Western Byzantium is bashed and reduced; a third Caliphate springs up!
781 A strong Abbasid army reinvades Anatolia and defeats the Byzantines at the Mauropotamos, not far from Nicaea
782 Marcianus Bulla dies in Syracuse, leaving the Western Byzantine crown to his second son Leontius III
783 The (Eastern) Byzantine general, the eunuch Staurakios, subdues the Slavs of Macedonia, where a new Byzantine theme (province) is established. In Anatolia Byzantium is instead defeated when the strategos of the Buccellarion theme, Tatzates, defects to the Abassids: the Byzantines have to pay tribute and return the border fortress of Melitene (*OTL Malatya) to Caliph Harun ar-Rashid
784 The Japanese capital is moved to Nagaoka. Offa the Mighty, king of Mercia, builds Offa’s Wall against Welsh encroachments. The Maurians (*OTL Moroccans) take and sack Tlemsen: the Kahinid Exarchate fragments in local Numidian petty principalities, divided between the influence of Mauretania and that of Western Byzantium/Syracuse
785 Saxony is finally conquered and forcibly Christianized by HRCEW Charles I the Great after almost thirty years of bloody campaigns
ca. 785 Foundation of the kingdom of Kanem northeast of Lake Chad under king Dugu, from the mixed-blood black-Berber Kanuris
786 In Constantinople empress regent Irene has a council of bishops held to renegade Iconoclasm, but the army, strongly Iconoclast, forcibly dissolves it. Leo II, prince of Abasgia/Lazica/Abkhazia and a grandson of the Khazar Khagan, expels the Byzantines from western Iberia/Georgia, which passes under Khazar suzerainty. Ashot I Bagratuni the Great puts an end to the civil wars in inner Iberia/Georgia and ascends the royal throne at Tao-Klarjeti
787 The Council of Nicaea, this time held peacefully, condemns Iconoclasm. First large Danish Viking raid upon England. The Khazars subdue the Bishopric of Doros, the last independent Gothic stronghold in the Taurida (*OTL Crimea)
788 A new swift campaign of emperor Charles in southern Italy, with Lombard support, crushes the Western Byzantine Exarchates of Salerno and Taranto at the battle of Conza (Campania); the former is entrusted as appanage to Pepin the Hunchback, Charles’s first disinherited son, as King of Salerno; the latter goes to Anspert, younger brother of king Liutpert of (northern) Lombardy, as Duke of Taranto, while its territories north of the Ofanto river are annexed to Spoleto. Leontius III Bulla, withdrawing south, leads the strong defence of Calabria, gaining a defensive victory at Castroleone (*OTL Campo Tenese), where he builds a strong fortress. The Franks also quash Slovenian unrest in the vassal principality of Koroška/Carantania (Carinthia). Reunification of the Arakan kingdom (western Burma) under the Wethali dynasty
788-790 The (northern) Lombard king Liutpert attacks the Venetic Exarchate of Adria wresting Triest and Histria from it, while the Spoletan Lombards besiege Ravenna; in the end the Venet(ic)ians of Doge (Duke) John Galbaius, seeing their profitable trade with the interior blocked, surrender and accept to pay tribute and recognize a nominal Frankish-Lombard suzerainty in a peace accord brokered by Pope Adrian I: for the intermediation the Papacy gains Ravenna
789-791 Idris ibn Abdallah, a Shiite scion of Prophet Muhammad through ‘Alì, exiled with many followers first from Baghdad, then from Egypt, conquers Tripoli and crushes the Kharijite State of Djebel Nefusah, founding the first Shiite Caliphate in Lybia; now Islam has no more two, but three rival Caliphs!
790 The (eastern) Byzantine army dictates the end of Irene’s regency at Constantinople, enthroning as the legitimate basileus 20-year-old Constantine VI. The Malay kingdom of Srivijaya, ruled by the Sailendra dynasty (claiming descendance from the Funan empire rulers), conquers lower Chenla and vassalizes the Khmers. Idris ibn Abdallah’s forces retake the island of Djirva (*OTL Djerba) from Western Byzantium/Syracuse
ca. 790 Dhruva Rashtrakuta of Karnataka defeats Vathsaraja of the Gurjara-Pratiharas of central India and Dharmapala of Bengal and extracts tribute from the ruler of Kanauj, enforcing Rashtrakutan paramountry on southern-central India. Daylam (an area of northern Persia/Iran between Rayy and the Caspian Sea), a Zoroastrian stronghold, breaks free from the Abbasid Caliphate under Justan I