Battle of Otepää
1217 CE.
Shown on the map at 58.057°, 26.505°.
The Battle of Otepää (Russian: Битва при Оденпе) was a battle during the Livonian Crusade in February 1217. The battle ended in a compromise, with the Russians allowing the Germans to leave the fortress.
Text from the Wikipedia article Battle of Otepää, licensed CC BY-SA 4.0.