This section needs expansion. You can help by adding to it. (July 2015)
2 February – Sweden joins the Count's Feud to support the Danish throne claimant Christian against the Lübeck -supported Christian II.
- The King's brother-in-law John VII of Hoya, vassal of Viborg, joins the enemy Lübeck in the ongoing Counts Feud.
- The Pagan holy well at Sånga is destroyed on the order of Laurentius Petri.
31 October – Halmstad is taken by the Swedish army.
- The monarch conquers Viborg in the province of Finland from his brother-in-law John of Hoya, who supported Lübeck, and thereby crushes the Hanseatic influence in Finland. John of Hoya flees to Estonia.