World Timeline

AD 842: January 20 – Emperor Theophilos dies of dysentery at Constantinople, after a 12-year reign in which he expended much effort defending the eastern frontier against the invading Muslim Arabs. Theophilos is succeeded by his 2-year-old son Michael III, with his mother Theodora as regent and the 'temporary' sole ruler of the Byzantine Empire.
 
AD 843: The Treaty of Verdun was signed, ending the Carolingian civil war and dividing the Carolingian Empire between Lothair I, Louis II and Charles II, the surviving sons of the emperor Louis I.
 
AD 844: Theoktistos, the de facto regent of Byzantine Empire, led an army to went on an expedition to Anatolia against Arabian raiders. The Byzantines were defeated.
 
AD 845: Great Anti-Buddhist Persecution: Emperor Wu Zong begins the persecution of Buddhists and other foreign religions in China, such as Zoroastrianism, Nestorian Christianity and Manichaeism. More than 4,600 monasteries, 40,000 temples and numerous shrines are destroyed. More than 260,000 Buddhist monks and nuns are forced to return to secular life.
 
AD 846: The Arab raid against Rome took place, with plundering taking place in the outskirts of the city, but the city proper being protected by the Aurelian Walls.
 
AD 847: Danish Vikings land in the Breton March (western part of Gaul). Duke Nominoe of Brittany fails to withstand them in battle, but succeeds in buying them off with gifts and persuading them to leave (approximate date).
 
AD 848: The Saracens conquer Ragusa (Sicily), after its Byzantine garrison is forced by severe famine to surrender. The city and its castle are razed to the ground.
 
AD 849: The Battle of Ostia, a naval battle between an Italian league of Papal, Neapolitan, Amalfitan, and Gaetan ships and a Muslim fleet, ended in an Italian victory, bringing an end to the period of Muslim military incursions in Rome.
 
AD 852: In China, Zhu Wen was born, who would later bacome a revolutionary leader and directly cause Tang Dynasty's fall (killing almost everyone in the royal court).
 
AD 856: A severe earthquake struck Damghan, Iran, killing over 200,000 people. Historians estimate that it had a magnitude of 7.9 Mw, making it one of the strongest earthquakes in human history.
 
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AD 857: The first recorded major outbreak of ergotism kills thousands of people in the Rhine Valley. They have eaten bread made from rye infected with the ergot fungus parasite Claviceps purpurea (approximate date).
 
AD 860: The Japanese alphabet Hiragana becomes more popular in Japan. The phonetic alphabet will be further simplified, and reduced to 51 basic characters (approximate date).
 
AD 863: In June, Tang Dynasty abolished its government organizations in Annan (nowadays northern Vietnam and southern Guangxi). However, just one month later after a military victory, the administration got re-established.
 
AD 866: The Great Heathen Army of the Vikings rides north to Northumbria. The Northumbrians are preoccupied with a civil war, and the Danes enter York unopposed.
 
AD 867: September 24 – Emperor Michael III is murdered, by order of his co-emperor Basil I. Basil becomes sole ruler (basileus) of the Byzantine Empire, and founds the Macedonian Dynasty (until 1056). Basil rebuilds the Byzantine army and navy, in an effort to restore the empire.
 
Too much violence these years! We need some more civilized event!

AD 868: The Diamond Sutra, a classic Buddhist text, was printed in China by Wang Jie. It was the earliest printed work (in contrast to works copied by hand) whose exact printing time could be confirmed.
 
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AD 872: Fujiwara no Yoshifusa, Japanese regent (sesshō), dies at his native Kyoto, having ruled since 858. He is succeeded as head of the Fujiwara clan by his son Fujiwara no Mototsune.
 
AD 873: Al-Andalus: The city of Toledo (modern Spain) rises up for a second time against Umayyad rule, due to ethnic tensions over two years.
 
AD 874: Huang Chao, a salt privateer, joins forces with Wang Xianzhi to raise a rebel army at Changyuan (modern Xinxiang). The uprising further weakens the Tang dynasty, which is already weakened by natural disasters such as severe droughts and floods.
 
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