Battle of Placentia
193 BCE.
Shown on the map at 45.033°, 9.700°.
The Battle of Placentia was fought in 194 BC, near Placentia, between the Roman Republic and the Boii. The Roman army won the battle. The following year, another battle with the Boii would take place in the same region; known as the Battle of Mutina, it would end the Boii threat.
Text from the Wikipedia article Battle of Placentia (194 BC), licensed CC BY-SA 4.0.