Battle of Pieve al Toppo
1288 CE.
Shown on the map at 43.407°, 11.795°.
The Battle of Pieve al Toppo was fought between Arezzo and Siena. The two sides engaged in the battle, and Arezzo was able to take the town. Later on in history, Florence would take over the town, and Arezzo was forced to retake it all over again.
Text from the Wikipedia article Battle of Pieve al Toppo, licensed CC BY-SA 4.0.