906

By place

Europe

• February 27 - Battle of Fritzlar: The Conradines defeat the Babenberg counts, to establish themselves as dukes of Franconia. Count Conrad the Elder is killed in the battle; his son Conrad the Younger becomes duke of Franconia.
• Summer - Duke Mojmir II halts the advance of the plundering Hungarians under Grand Prince Árpád in Great Moravia.

Britain

• King Constantine II of Scotland calls for an assembly to meet at Scone. Scottish Christian clergy under Bishop Cellach pledges that the laws and disciplines of the faith, and the laws of churches and gospels, should be kept pariter cum Scottis.

Arabian Empire

• October 22 - Abbasid commander Ahmad ibn Kayghalagh leads a raid against the Byzantine Empire from Tarsus, joined by the governor Rustam ibn Baradu. He reaches the Halys River and takes 4,000–5,000 captives.

Asia

• January 22 - The warlord Zhu Quanzhong secretly puts Empress Dowager He, the wife of the late Emperor Zhaozong and mother of the reigning Emperor Ai, to death and has her defamed and posthumously demoted to commoner rank.

Armenia

• 906 K'argop' earthquake: It takes place in the monastery K'argop', Armenia. The monastery is also known as Xotakerk', the monastery of the Vegetarians. The earthquake occurs approximately 150 years following the 735 Vayots Dzor Province earthquake, and affects the same region.