By place Byzantine Empire •
September –
Battle of Kopidnadon: An
Abbasid expeditionary force crosses the
Cilician Gates into the
Anatolic Theme (modern
Turkey). It is confronted by two
Byzantine armies at
Podandos in
Cappadocia, who are defeated. • Byzantine troops led by
Adalgis, son of former
Lombard king
Desiderius, invade southern
Italy. His attempts are thwarted by the
Franks, who attack territories in
Benevento, obtaining notably the annexion of
Chieti (
Spoleto).
Europe • King
Charlemagne conquers
Bavaria, and incorporates it into the
Frankish Kingdom. Duke
Tassilo III is deposed, and banished to a
monastery. •
Grimoald III, Lombard
duke of Benevento, is installed as semi-client by King
Charles the Younger (son of Charlemagne) at
Benevento (Italy). • The
Avars, who are allied with Tassilo III, invade
East Francia (modern
Germany). This begins the
Frankish-Avar conflict. • King
Mauregatus of Asturias dies after a 5-year reign, and is succeeded by
Bermudo I as ruler of
Asturias (modern
Spain). •
Abd al-Rahman I, emir of
Córdoba, dies after a 32-year reign and is succeeded by his son
Hisham I. • The
earliest recorded tornado in Europe struck
Freising in 788.
Britain • King
Ælfwald I of Northumbria is murdered, probably at
Chesters, by the
patricius (
ealdorman)
Sicga. He is succeeded by his cousin
Osred II.
Abbasid Caliphate of caliph
Harun al-Rashid dated
AH 171 (AD 788) •
September –
Battle of Kopidnadon: An Abbasid expeditionary force against the
Byzantine Empire crosses the
Cilician Gates into the
Anatolic Theme. The
Abbasid army launches an invasion of Byzantine Asia Minor, and is confronted by a Byzantine force at Kopidnadon. The battle results in an
Abbasid victory. •
Idris ibn Abdallah, known as the "founder of Morocco", settles in Volubilis, beginning the reign of the
Idrisid Dynasty (Morocco had effectively been independent from the Arab
caliphates since the
Great Berber Revolt).
By topic Religion • The period covered in
Adam of Bremen's historical
treatise of the
Archbishopric of Hamburg begins. • The
Enryaku-ji temple complex is founded by
Saichō, a
Buddhist monk, on
Mount Hiei in
Ōtsu (
Japan). == Births ==