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.
 
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