Battle of Épila
1348 CE.
Shown on the map at 41.599°, -1.280°.
The Battle of Épila was fought on July 21, 1348, near Zaragoza, in what is now Spain, between the supporters of the Union of Aragon and King Peter IV, led by Don Lope de Luna. This battle was the culmination of a long confrontation between a large segment of the nobility and the people of Aragon against the king, ending with the decisive defeat of the Union.
Text from the Wikipedia article Battle of Épila, licensed CC BY-SA 4.0.