Editing 813 (section)

==== Byzantine Empire ====
* [[June 22]] &ndash; [[Battle of Versinikia]]: The [[Bulgars]], led by [[Krum]], ruler (''[[Khan (title)|khan]]'') of the [[First Bulgarian Empire|Bulgarian Empire]], defeat Emperor [[Michael I Rangabe|Michael I]] near [[Edirne]] (modern [[Turkey]]). The [[Byzantine army]] (26,000 men) is destroyed by a counter-attack of Bulgarian [[heavy cavalry]], while trapped in the valley. Krum captures the Byzantine [[Military camp|camp]] and a rich prize, including [[gold]] and [[weapon]]ry.
* [[July 11]] &ndash; Michael I, under threat by conspiracies, abdicates in favor of his general [[Leo V the Armenian|Leo the Armenian]], and becomes a [[monk]] (under the name Athanasius). His sons are [[Castration|castrated]] to prevent them succeeding the [[Byzantine Empire|Byzantine]] throne, and relegated into [[Monastery|monasteries]]. One of them, Niketas (renamed [[Ignatios of Constantinople|Ignatius]]), eventually becomes a [[Ecumenical Patriarch of Constantinople|patriarch of Constantinople]].
* [[July 17]] &ndash; Krum reaches [[Constantinople]], and [[Siege of Constantinople (813)|sets his camp]] outside the walls. He is given an invitation, and a promise of safe conduct, to meet Leo V. Krum sets out unarmed for the capital with only a small escort, but is [[ambush]]ed and manages to escape. After this unsuccessful Byzantine murder attempt, the Bulgars ravage much of [[East Thrace|Eastern Thrace]].<ref>{{The Early Medieval Balkans|pp=98–99}}</ref>
* Autumn &ndash; [[Siege of Adrianople (813)|Siege of Adrianople]]: Krum captures Adrianople—one of the most important Byzantine fortresses in [[Thrace]]—after being attacked with [[siege engine]]s. The [[garrison]] is forced to surrender, due to [[starvation]]. On the orders of Krum, the population of the surrounding area (numbering about 10,000) is transferred to Bulgarian territory, north of the [[Danube]].<ref>Runciman, [http://www.promacedonia.com/en/sr_2_1.htm pp. 64–65]{{Dead link|date=September 2018 |bot=InternetArchiveBot |fix-attempted=yes }}.</ref> 
* [[Ashot I of Iberia|Ashot I]] ("the Great") becomes the first [[Bagrationi dynasty|Georgian Bagratid]] prince of [[Principality of Iberia|Iberia]], under Byzantine protection.