|Al-Mu'tazz is Caliph of the Abbasid .|
|865 in other calendars|
|Armenian calendar||313/314 (turn of the year July)|
|Buddhist calendar||1408/09 (southern Buddhism); 1407/08 (alternative calculation according to Buddha's Parinirvana )|
|Chinese calendar||59th (60th) cycle|
|Chula Sakarat (Siam, Myanmar) / Dai calendar (Vietnam)||227/228 (turn of the year April)|
|Iranian calendar||243/244 (around March 21)|
|Islamic calendar||250/251 (February 1-2)|
|Jewish calendar||4625/26 (23/24 September)|
from urbe condita MDCXVIII (1618)
Diocletian's era : 581/582 (New Year November)
|Seleucid era||Babylon: 1175/76 (turn of the year April)
Syria: 1176/77 (New Year October)
|Vikram Sambat (Nepalese Calendar)||921/922 (turn of the year April)|
Politics and world events
- Viking Age : In East Anglia in England , the " Great Pagan Army " lands , an army consisting mainly of Danish Vikings , which under the command of the brothers Halfdan Ragnarsson and Ivar the Boneless and with the support of their brother Ubba Ragnarsson through the Land moves and wages war against the small Anglo-Saxon kingdoms. The trigger could have been the execution of her father Ragnar Lodbrok by Ælle in Northumbria .
- Ludwig the German divides Eastern Franconia among his sons Karlmann , Ludwig , called the Younger, and Karl III. , also called the fat one.
When another conspiracy broke out by Turkish officer groups, al-Musta'in bi-llah , Abbasid caliph , flees to Baghdad from the court of the caliphs in Samarra . The opposition troops then proclaim al-Muʿtazz as caliph. During the civil war that followed, the opposition units besieged Baghdad. Al-Musta'in bi-llah is supported by the Tahirids , but these are bound by the uprising of al-Hasan ibn Zaid in Tabaristan .
First documentary mentions
- October 20 : Winningen is mentioned for the first time in a document from Ludwig the German .
- In a document of the monastery Niederaltaich is Schöllnach first mentioned.
- In a document of the Benedictine Abbey Seligenstadt is Obertshausen first mentioned.
- Weibern is first mentioned in a document from the Prüm Abbey .
- The places Hambach an der Weinstrasse , Hampersdorf , Iversheim , Lehmen and Spöck are first mentioned in a document.
- February 3 : Ansgar , first bishop of Hamburg-Bremen (* around 801 )
- March 8 : Rudolf von Fulda , East Franconian monk, historian and theologian (* before 800)
- Æthelberht , King of Wessex (* around 835 )
- Ernst , Franconian nobleman, border count in the Bavarian northern district
- Raymond I , Count of Toulouse, Carcassonne, Rouerge and Quercy, Vice-Count of Albi
- around 865: Pippin II , King of Aquitaine (* around 823 )