Battle of Turaida
1211 CE.
Shown on the map at 57.183°, 24.850°.
Battle of Turaida was one of the biggest battles of Livonian crusade between Estonian tribes and Livonian Brothers of the Sword. The battle took place around modern Turaida, Latvia.
Text from the Wikipedia article Battle of Turaida (1211), licensed CC BY-SA 4.0.