Battle of Alavus
1808 CE.
Shown on the map at 62.586°, 23.616°.
The Battle of Alavus took place on 17 August 1808 in the vicinity of the town of Alavus (Swedish: Alavo), as part of the Finnish War. The Finnish army, under the command of General Carl Johan Adlercreutz defeated a smaller Russian force and drove it southwards. It was the last in a string of Swedish successes during the summer of 1808, and marked the turning point in the war.
Text from the Wikipedia article Battle of Alavus, licensed CC BY-SA 4.0.