Battle of the Cremera
476 BCE.
Shown on the map at 42.029°, 12.425°.
The Battle of the Cremera was fought between the Roman Republic and the Etruscan city of Veii, in 477 BC (AUC 277). It most likely occurred on 18 July, although Ovid gives a different date of 13 February.
Text from the Wikipedia article Battle of the Cremera, licensed CC BY-SA 4.0.