Although the Volscians had sworn to a truce of arms for the space of two years, the Romans themselves soon furnished them with a pretence, by making proclamation, out of some jealousy or slanderous report, at an exhibition of games, that all the Volscians who had come to see them should depart from the city before sunset. some affirm that this was a contrivance of Marcius, who sent a man privately to the consuls, falsely to accuse the Volscians of intending to fall upon the Romans during the games, and to set the city on fire. This public affront aroused their hostility to the Romans; and Tullus, perceiving it, took advantage of it, aggravating the fact, and working on their indignation, till he persuaded them, at last, to despatch ambassadors to Rome, requiring the Romans to restore that part of their country and those towns which they had taken from the Volscian in the late war. When the Romans heard the message, they indignantly replied, that the Volscians were the first that took up arms, but the Romans would be the last to lay them down. This answer being brought back, Tullus called a general assembly of the Volscians;and the voted passing for a war, he then proposed that they should call in Marcius, laying aside the remembrance of former grudges, and assuring themselves that the services they should now receive from him as friend and associate, would abundantly outweigh any harm or damage he had done them when he was their enemy. Marcius was accordingly summoned, and having made his entrance, and spoken tot he people, won their good opinion of his capacity, his skill, counsel, and boldness, not less by his present words than by his past actions. They joined him in commission with Tullus, to have full power as general of their forces in all that related to the war. And he, fearing lest the time that would be requisite to bring all the Volscians together in full preparation might be so long as to lose him the opportunity of action, left order with the chief persons and magistrates for the city to provide other things, while he himself, prevailing upon the readiest to assemble and march out with him as volunteers without staying to be enrolled, made a sudden inroad into the Roman confines, when nobody expected him, and possessed himself of so much booty, that the Volscians found they had more than they could either carry away or use in the camp. The abundance of provision which he gained, and the waste and havoc of the country which he made, were, however, the smallest results of that invasion; the great mischief he intended, and his special object in all, was to increase at Rome the suspicions entertained of the patricians, and to make them upon worse terms with the people. With this view, while despoiling all the fields and destroying the property of other men, he took special care to preserve their farms and lands untouched, and would not allow his soldiers to ravage there, or seize upon any thing which belonged to them. Hence the quarrels broke out afresh, and rose to a greater height than ever; the senators reproaching those of the commonalty with their late injustice to Marcius; while the plebeians, on their side, did not hesitate to accuse them of having, out of spite and revenge, solicited him to this enterprise, and thus, when others were involved in the miseries of a war by their means, they sat like unconcerned spectators furnished with a guardian abroad of their fortunes, in the very person of the public enemy. After this incursion and exploit, which was of great advantage to the Volscians, since they learned by it to be more courageous and to despise their enemy, Marcius drew them off, and returned in safety.
But when the whole strength of the Volscians was brought together into the field, with great expedition, it appeared so considerable a body, that they agreed to leave part in garrison, for the security of their towns, and with the other part to march against the Romans. Marcius now desired Tullus to choose which of the two charges would be most agreeable to him. Tullus answered, that since he knew Marcius to be equally valiant with himself, and far more fortunate, he would have him take the command of those that were going out to the war, while he made it his care to defend their cities at home, and provide all conveniences for the army abroad. Marcius thus reinforced, and much stronger than before, moved first towards the city called Circaeum, a Roman colony. He received its surrender, and did the inhabitants no injury; passing thence, he entered and laid waste the country of the Latins, where he expected the Romans would meet him, as the Latins were their confederates and allies, and had often sent to demand succor from them. the people, however, on their part, showing little inclination for the service, and the consuls themselves being unwilling to run the hazard of a battle, when the time of their office was almost ready to expire, they dismissed the Latin ambassadors without any effect; so that Marcius, finding no army to oppose him, marched up to their cities, and, having taken by force Toleria, Lavici, Peda, and Bols, all of which offered resistance, not only plundered their houses, but made a prey likewise of their persons. Meantime, he showed particular regard for all such as came over to his party, and, for fear they might sustain any damage against his will, encamped them at the greatest distance he could, and wholly abstained from their property.