* Alfred the Great becomes king of Wessex after his brother's death
* Muslim conquest of Sicily begins
* Vikings defeat a combined Mercian and West Saxon army at Reading
* Vikings take London; Alfred withdraws to Athelney to gather a new army
* Vikings capture York as their main base in Northumbria
* Lothair II makes Charles king of Lotharingia
* Louis the German invades Italy
* Byzantine victory over Paulicians at Battle of Bathys Ryax
* Great Mosque of Kairouan completed