Battle of the Vega of Granada
1319 CE.
Shown on the map at 37.250°, -3.750°.
The Battle of Sierra Elvira, also called the Disaster of the Vega de Granada, was a battle of the Spanish Reconquista fought near the city of Granada on 25 June 1319 (6 Jumada al-Awwal 719 AH). The battle was fought between the troops of the Emirate of Granada and those of the Kingdom of Castile. The battle resulted in a catastrophic defeat for Castile.
Text from the Wikipedia article Battle of the Vega of Granada, licensed CC BY-SA 4.0.