Battle of Polvoraria
878 CE.
Shown on the map at 41.966°, -5.682°.
The Battle of Polvoraria (also known as the Battle of Polvorosa) took place in 878 between troops of the Kingdom of Asturias under Alfonso III of Asturias and a Muslim army of the Emirate of Córdoba under Emir Muhammad I of Córdoba. It occurred near the confluence of the Órbigo and Esla rivers and was an Asturian victory.
Text from the Wikipedia article Battle of Polvoraria, licensed CC BY-SA 4.0.