Editing 849 (section)

=== By place ===

==== Europe ====

* Summer &ndash; [[Battle of Ostia]]: A [[Saracen]] Arab fleet from [[Sardinia]] sets sail towards [[Rome]]. In response, [[Pope Leo IV]] forms a coalition of maritime Italian cities, including [[Duchy of Naples|Naples]], [[Republic of Amalfi|Amalfi]] and [[Duchy of Gaeta|Gaeta]], led by Admiral [[Caesar of Naples|Caesar]] — which is assembled off the re-[[Fortification|fortified]] port of [[Ostia (Rome)|Ostia]] — and repels the Saracen [[Piracy|marauder]]s. Their navy is scattered, resulting in many sunken vessels. Rome is saved from plunder and the expansion of the [[Aghlabids]].<ref>{{cite book|last=Benvenuti|first=Gino|title=Le Repubbliche Marinare. Amalfi, Pisa, Genova e Venezia|year=1985|publisher=Newton & Compton Editori|location=Rome|isbn=88-8289-529-7|page=15}}</ref> 
* Frankish forces under King [[Charles the Bald]] invade southern [[France]], and conquer the territory of [[County of Toulouse|Toulouse]]. He appoints [[Fredelo, Count of Toulouse|Fredelo]] as count (''[[Count|comté]]'') of Toulouse, who founds the [[Rouergue]] dynasty. [[Aquitaine]] is submitted to the [[West Francia|West Frankish Kingdom]].

==== Abbasid Caliphate ====
* The [[Armenians|Armenian]] prince [[Bagrat II Bagratuni|Bagrat II]] begins a rebellion against Caliph [[Al-Mutawakkil]], of the [[Abbasid Caliphate]].

==== Asia ====
* In the Chinese capital city of [[Chang'an]], an imperial prince is [[Impeachment|impeached]] during the [[Tang dynasty|Tang Dynasty]] from his position by officials at court, for erecting a building that obstructs a street in the northwesternmost ward in [[Chang'an#South Central Chang'an|South Central Chang'an]].
* King [[Pyinbya]] of [[Myanmar|Burma]] founds the city of [[Bagan]], located in the [[Mandalay Region]], and fortifies it with walls.</onlyinclude>