Battle of Trocadero
1823 CE.
Shown on the map at 36.520°, -6.228°.
The Battle of Trocadero, fought on 31 August 1823, was a significant battle in France's expedition in support of the Spanish King Ferdinand VII. The French defeated the Spanish liberal forces and restored Ferdinand to absolute rule.
Text from the Wikipedia article Battle of Trocadero, licensed CC BY-SA 4.0.