Battle of Verona
312 CE.
Shown on the map at 45.433°, 10.983°.
The Battle of Verona was fought in 312 between the forces of the Roman emperors Constantine I and Maxentius. Maxentius' forces were defeated, and Ruricius Pompeianus, the most senior Maxentian commander, was killed in the fighting.
Text from the Wikipedia article Battle of Verona (312), licensed CC BY-SA 4.0.