Battle of Setina
1017 CE.
Shown on the map at 40.867°, 21.617°.
The Battle of Setina (Bulgarian: Битка при Сетина) took place in the autumn of 1017 near the village of Setina in modern northwestern Greece between the armies of the Bulgarian Empire and Byzantine Empire. The result was aByzantine victory.
Text from the Wikipedia article Battle of Setina, licensed CC BY-SA 4.0.