Battle of Lutos
794 CE.
Shown on the map at 43.333°, -6.417°.
The Battle of Lutos occurred in 794 when the Emir of Cordoba, Hisham I sent military incursions against the Kingdom of Asturias under the command of the brothers Abd al-Karim ibn Abd al-Walid ibn Mugaith and Abd al-Malik ibn Abd al-Walid ibn Mugaith.
Text from the Wikipedia article Battle of Lutos, licensed CC BY-SA 4.0.