Battle of Agrigentum
260 BCE.
Shown on the map at 37.317°, 13.583°.
The Battle of Agrigentum (Sicily, 262 BC) was the first pitched battle of the First Punic War and the first large-scale military confrontation between Carthage and the Roman Republic. The battle was fought after a long siege which started in 262 BC and resulted both in a Roman victory and the beginning of Roman control of Sicily.
Text from the Wikipedia article Battle of Agrigentum, licensed CC BY-SA 4.0.