Battle of Lautulae
314 BCE.
Shown on the map at 41.283°, 13.250°.
The Battle of Lautulae was fought in 315 BC during the Second Samnite War, opposing the Roman Republic (led by dictator Quintus Fabius Maximus Rullianus) and the Samnites, who defeated the Romans.
Text from the Wikipedia article Battle of Lautulae, licensed CC BY-SA 4.0.