Text #9644"Roman-Etruscan Wars", in .
In the 7th century BC, during the reign of Rome’s third king, Tullus Hostilius, the Fidenates and Veientes again went to war with Rome. According to Livy they were incited to war by Mettius Fufetius, the dictator of Alba Longa, who had been defeated by and had become in substance a vassal of Rome.
The Fidenates openly revolted against Rome. Tullus summoned Mettius and his army from Alba Longa and, together with the Roman army, marched on Fidenae. The Roman and Alban army crossed the Anio and camped near the confluxion of the Anio and the Tiber. The army of Veii crossed the Tiber also and, with the Fidenates, formed up battle lines next to the river, the Veientes closest to the river and the Fidenates nearest the mountains. The Roman-Alban army formed up facing them, the Romans towards the Veientes and the Albans towards the Fidenates.
The battle commenced, however Mettius and the Alban troops headed slowly towards the mountains, intending to desert. Tullus exhorted his troops, telling them the Alban army had moved pursuant to his orders. The Fidenates, who being Roman colonists understood Latin, heard what Tullus said about the Albans and feared the Alban army would charge down upon them from the rear: accordingly they fled the battle. The Romans then routed the Veientes.