Battle of Lobregal
1160 CE.
Shown on the map at 41.825°, -5.111°.
The Battle of Lobregal took place in March 1160 between the House of Lara and its allies and the forces of the House of Castro under Fernando Rodríguez de Castro. The result was a victory for the House of Castro.
Text from the Wikipedia article Battle of Lobregal, licensed CC BY-SA 4.0.