Battle of Sacriporto
81 BCE.
Shown on the map at 41.700°, 13.050°.
The Battle of Sacriportus, also called the Battle of Sacriporto, took place in April of 82 BC during Sulla's Second Civil War. The battle pitted the Optimates under the command of Lucius Cornelius Sulla Felix against the Populares forces commanded by Gaius Marius the Younger. The battle resulted in a decisive Optimate victory.
Text from the Wikipedia article Battle of Sacriportus, licensed CC BY-SA 4.0.