By the time
Al-Ma'mun became caliph, the Arabs and the Byzantines had settled down into border skirmishing, with Arab raids deep into
Anatolia to capture booty.
Byzantine general and usurper
Thomas the Slav continues his revolt against Emperor
Michael II. He unsuccessfully besieges
Constantinople, while his fleet is destroyed by Michael's fleet, using
Greek fire.
King
Ceolwulf I of Mercia invades
Powys (
Wales), but is beaten back by King
Cyngen. However, Ceolwulf does destroy the fortress of
Deganwy, and later takes the kingdom under his control (approximate date).
February 6 –
Ukit Took becomes the last ruler (ajaw) of the
Mayan city-state
Copán (modern
Guatemala). After his death in
830, the kingdom is wiped out, most likely from an epidemic.
Emperor
Michael II defeats the rebel forces under
Thomas the Slav in
Thrace. He and his supporters are forced to seek refuge in
Arkadiopolis (modern
Turkey). After five months of
blockade, Thomas surrenders and is delivered to Michael, seated on a
donkey and bound in chains. He pleads for clemency and
prostrates before Michael, but is executed.[7][8]
A group of Persio-Assyrian adherents of the
Church of the East, under the leadership of two Persian bishops Prod (or Proth, also known as Aphroth) and Sappor (also known as Sabrisho), reach Kerala, India and reside in Quilon.
May –
Euphemius, Byzantine admiral, organises an uprising in
Sicily against Emperor
Michael II. He proclaims himself Emperor (with the title of basileus) in
Syracuse, independent from
Constantinople. In turn, Euphemius is defeated by Byzantine troops (reinforcements from the
East), and is driven out to
North Africa.[11]
Æthelstan establishes himself as king of
East Anglia, after killing King
Ludeca of Mercia in battle. Ludeca is succeeded by
Wiglaf, father-in-law (and probably distant cousin) of the late king
Ceolwulf I's daughter.
China
Emperor
Jing Zong is assassinated by a group of conspirators. He is succeeded by his brother
Wen Zong, as ruler of the
Tang Dynasty.
Summer –
Euphemius, Byzantine admiral, is murdered by emissaries from the Byzantine
garrison at
Castrogiovanni, which is besieged by the Muslims. Threatened by Byzantine reinforcements arriving from
Constantinople, the survivors burn their ships and retreat overland westward to
Mazara del Vallo.[16][17]
Kydonia, on the northwest coast of
Crete, is destroyed by
Saracen pirates (approximate date).
Alcamo in Sicily is founded by the Muslim commander al-Kamuk (approximate date).
China
In the capital of
Chang'an, a powerful court
eunuch orders 50
wrestlers to arrest 300 commoners over a land property dispute in
Northwest Chang'an, whereupon a
riot breaks out in the streets.
Emperor
Louis the Pious appoints his 6-year-old son
Charles (by his second wife
Judith) as ruler of the Frankish subkingdom
Alamannia, enraging his eldest son and co-emperor
Lothair I, who begins an insurrection.
Viking chieftain
Halfdan the Black becomes king of
Agder (modern
Norway). He expands his realm through military conquest and political negotiations, dividing the kingdom of
Vestfold with his half-brother
Olaf.
Winter – Battle of the River Dore: Egbert of Wessex leads his army against the
Northumbrians as far as
Dore, where he clashes with King
Eanred of Northumbria.
^Lemerle, Paul (1965). "Thomas le Slave". Travaux et mémoires 1 (in French). Paris: Centre de recherche d'histoire et civilisation de Byzance. pp. 279–281, 291.
OCLC457007063.
By the time
Al-Ma'mun became caliph, the Arabs and the Byzantines had settled down into border skirmishing, with Arab raids deep into
Anatolia to capture booty.
Byzantine general and usurper
Thomas the Slav continues his revolt against Emperor
Michael II. He unsuccessfully besieges
Constantinople, while his fleet is destroyed by Michael's fleet, using
Greek fire.
King
Ceolwulf I of Mercia invades
Powys (
Wales), but is beaten back by King
Cyngen. However, Ceolwulf does destroy the fortress of
Deganwy, and later takes the kingdom under his control (approximate date).
February 6 –
Ukit Took becomes the last ruler (ajaw) of the
Mayan city-state
Copán (modern
Guatemala). After his death in
830, the kingdom is wiped out, most likely from an epidemic.
Emperor
Michael II defeats the rebel forces under
Thomas the Slav in
Thrace. He and his supporters are forced to seek refuge in
Arkadiopolis (modern
Turkey). After five months of
blockade, Thomas surrenders and is delivered to Michael, seated on a
donkey and bound in chains. He pleads for clemency and
prostrates before Michael, but is executed.[7][8]
A group of Persio-Assyrian adherents of the
Church of the East, under the leadership of two Persian bishops Prod (or Proth, also known as Aphroth) and Sappor (also known as Sabrisho), reach Kerala, India and reside in Quilon.
May –
Euphemius, Byzantine admiral, organises an uprising in
Sicily against Emperor
Michael II. He proclaims himself Emperor (with the title of basileus) in
Syracuse, independent from
Constantinople. In turn, Euphemius is defeated by Byzantine troops (reinforcements from the
East), and is driven out to
North Africa.[11]
Æthelstan establishes himself as king of
East Anglia, after killing King
Ludeca of Mercia in battle. Ludeca is succeeded by
Wiglaf, father-in-law (and probably distant cousin) of the late king
Ceolwulf I's daughter.
China
Emperor
Jing Zong is assassinated by a group of conspirators. He is succeeded by his brother
Wen Zong, as ruler of the
Tang Dynasty.
Summer –
Euphemius, Byzantine admiral, is murdered by emissaries from the Byzantine
garrison at
Castrogiovanni, which is besieged by the Muslims. Threatened by Byzantine reinforcements arriving from
Constantinople, the survivors burn their ships and retreat overland westward to
Mazara del Vallo.[16][17]
Kydonia, on the northwest coast of
Crete, is destroyed by
Saracen pirates (approximate date).
Alcamo in Sicily is founded by the Muslim commander al-Kamuk (approximate date).
China
In the capital of
Chang'an, a powerful court
eunuch orders 50
wrestlers to arrest 300 commoners over a land property dispute in
Northwest Chang'an, whereupon a
riot breaks out in the streets.
Emperor
Louis the Pious appoints his 6-year-old son
Charles (by his second wife
Judith) as ruler of the Frankish subkingdom
Alamannia, enraging his eldest son and co-emperor
Lothair I, who begins an insurrection.
Viking chieftain
Halfdan the Black becomes king of
Agder (modern
Norway). He expands his realm through military conquest and political negotiations, dividing the kingdom of
Vestfold with his half-brother
Olaf.
Winter – Battle of the River Dore: Egbert of Wessex leads his army against the
Northumbrians as far as
Dore, where he clashes with King
Eanred of Northumbria.
^Lemerle, Paul (1965). "Thomas le Slave". Travaux et mémoires 1 (in French). Paris: Centre de recherche d'histoire et civilisation de Byzance. pp. 279–281, 291.
OCLC457007063.