918

By place

Europe

• December 23 - King Conrad I, injured at one of his battles with Arnulf I, dies at his residence in Weilburg Castle after a 7-year reign. On his deathbed Conrad persuades his younger brother Eberhard III to offer the East Frankish crown to Henry the Fowler, the duke of Saxony. Conrad is buried in Fulda Cathedral in Germany.

  Britain

• Battle of Corbridge: High-Reeve Ealdred I persuades King Constantine II of Scotland to help him reclaim his position in Bernicia. They mount an invasion of his now Norse controlled lands. The Vikings under Ragnall ua Ímair defeat the Scots and their allies at Corbridge, but take heavy casualties themselves.
• Summer - Lady Æthelflæd of Mercia begins to intrigue with disaffected factions within the Norse Kingdom of York. Mercian troops ravage the local countryside and peacefully overrun the fortress of Leicester, while her brother, King Edward the Elder, takes Stamford.
• June 12 - Æthelflæd is killed at Tamworth while fighting the Vikings. She is buried with her husband Æthelred in St. Oswald's Priory at Gloucester. Æthelflæd is succeeded by her only daughter Ælfwynn.
• Kings Idwal Foel of Gwynedd and Hywel ap Cadell, and Prince Clydog of Deheubarth submit to the overlordship of Edward the Elder. The Vikings raid Anglesey.

  Asia

• July 25 - Wang Kon, a Korean general, overthrows the government of the short-lived state Ho Goguryeo and ascends the throne at Cheorwon. He founds the Goryeo Dynasty and makes Song'ak his capital.
• Emperor Taizu of the Khitan Empire occupies a newly walled city called Shangjing, meaning Supreme Capital. It becomes the residence of the Chinese Liao Dynasty.