Battle of Fitjar
961 CE.
Shown on the map at 59.919°, 5.371°.
The Battle of Fitjar (Norwegian: Slaget ved Fitjar på Stord) took place in 961 in Fitjar on the island Stord in the county of Hordaland, Norway.
Text from the Wikipedia article Battle of Fitjar, licensed CC BY-SA 4.0.