9th Century (801–900)

battle in the Arab–Byzantine Wars

Canburg

805 or 807 military campaign involving Slavic tribes and the Byzantine empire

809 siege

Battle of Comacchio

battle

treaty

811 battle of the Fourth Fitna

812 siege

0813 battle

813 siege

siege in 813

in Shia Islam, the doctrine that a messianic figure (Mahdi) was born, has disappeared, and will one day return; according to Twelvers, this is the 12th Imam, going into Occultation in c. 874

c. 814 battle

816 battle

819 battle

peace treaty signed between Tri Ralpachen, Emperor of the Tibet Empire (629 - 877), and Emperor Tang Muzong of the Tang Dynasty of China in 822

824 battle

825 battle

827 battle