Battle of Danevirke: Emperor Otto II defeats the rebel forces of King Harald I, who has invaded Nordalbingia (modern-day Holstein), to shake off imperial overlordship. Otto's armies swiftly subdue the Danes, consolidating the frontier between Scandinavia and Northern Germany. Meanwhile, Henry II begins a rebellion against his cousin Otto. He forges alliances with Bavarian and Saxon nobles.
England
King Edgar I gives English help to Prince Hywel in ousting his uncle, King Iago of Gwynedd from his kingdom.
5 August – Caliph al-Muti, ill and incapacitated, is deposed and succeeded by his son al-Ta'i, dying shortly after.[2]
Africa
The Qarmatians are defeated north of Cairo by Fatimid forces under General Jawhar al-Siqilli. He consolidates Fatimid rule and sends a legation to the Christian land of Nubia to secure the southern border of Egypt. Arab traders introduce Islam to the population, which gradually supplants Christianity.