First Battle of Cellorigo
882 CE.
Shown on the map at 42.627°, -2.999°.
The First Battle of Cellorigo took place between the Kingdom of Asturias and the Emirate of Córdoba over the castle at Cellorigo and its surrounding countryside in 882.
Text from the Wikipedia article First Battle of Cellorigo, licensed CC BY-SA 4.0.