Editing 851 (section)

=== By place ===
==== Asia ====
* [[Bagrat II Bagratuni]], Armenian prince and leader of a rebellion against the [[Abbasid Caliphate]], is captured by the Abbasid army, and brought to the caliphal capital of [[Abbasid Samarra|Samarra]].{{sfn|Laurent|1919|pp=117–118, 122}}{{sfn|Ter-Ghewondyan|1976|pp=42–43}}

==== Britain ====
* [[Denmark|Danish]] [[Vikings|Viking]] raiders enter the [[Thames Estuary]], and plunder [[Canterbury]] and [[London]]. They land at [[Wembury]] near [[Plymouth]], but are defeated by [[Anglo-Saxons|Anglo-Saxon]] forces led by King [[Ethelwulf|Ethelwulf of Wessex]]. His eldest son [[Æthelstan of Kent]], accompanied by [[Ealdorman]] Ealhhere, attacks a Viking fleet off the coast at [[Sandwich, Kent|Sandwich]], and captures nine of the enemy vessels while the remainder flees.<ref>Paul Hill (2009): ''The Viking Wars of Alfred the Great'', p. 14. {{ISBN|978-1-59416-087-5}}.</ref>

==== China ====
* [[Sulaiman al-Tajir|Suleiman al-Tajir]], Muslim merchant and traveller, visits [[China]] during the [[Tang dynasty|Tang Dynasty]]. He observes the manufacturing of [[Chinese porcelain]] at [[Guangzhou]], and writes of his admiration for its transparent quality. Suleiman also describes the [[mosque]] at Guangzhou, its [[granaries]], its local government administration, some of its written records, and the treatment of travellers, along with the use of ceramics, [[rice wine]], and tea (approximate date).

==== Europe ====
* [[August 22]] &ndash; [[Battle of Jengland]]: Duke [[Erispoe]] takes command of the [[Bretons|Breton]] forces after his father [[Nominoe]], king of [[Duchy of Brittany|Brittany]], dies. He continues an offensive against the [[Franks]] in alliance with [[Lambert II of Nantes]]. In [[Ille-et-Vilaine]] near [[Grand-Fougeray]] (Brittany), Erispoe defeats a [[Francia|Frankish]]-[[Saxons|Saxon]] army (4,000 men) led by King [[Charles the Bald]].<ref name = "smi">Smith, Julia M. H. ''Province and Empire: Brittany and the Carolingians''. Cambridge University Press: 1992.</ref>
* [[Battle of Jengland#Treaty of Angers|Treaty of Angers]]: Charles the Bald meets Erispoe in [[Angers]], and acknowledges him as "king of Brittany". He recognizes the authority of Breton rule over the areas around [[County of Nantes|Nantes]], [[County of Rennes|Rennes]] and [[Pays de Retz]], which become part of the [[Marches of Neustria|Breton March]], a border zone. Erispoe takes the [[oath]] to Charles as king of the [[West Francia|West Frankish Kingdom]] (but not an ''hommage lige'' which would be an [[allegiance]]). To mark the sovereignty of the Breton state, the future [[List of rulers of Brittany|Dukes of Brittany]] are crowned as "Duke, king in their lands".<ref>[[Annales Bertiniani]].</ref>
* September &ndash; King [[Pepin II of Aquitaine]] is captured by the forces of Count [[Sancho II Sánchez of Gascony|Sans II Sancion]], and handed over to Charles the Bald. He is detained in the [[monastery]] of [[Abbey of St. Medard, Soissons|Saint Medard]] in [[Soissons]].<ref>Higounet, 39 n57.</ref>
* Emperor [[Lothair I]] meets with his (half) brothers [[Louis the German]] and Charles the Bald in [[Meerssen]] (modern-day [[Netherlands]]), to continue the system of "con-fraternal government".
* King [[Íñigo Arista of Pamplona]] dies after a 27-year reign. He is succeeded by his son [[García Íñiguez of Pamplona|García Íñiguez]], as king of [[Kingdom of Pamplona|Pamplona]] (later [[Kingdom of Navarra|Navarra]]).