It is true that not long afterwards the victorious army was attacked in crossing a river by Marius Egnatius, and so emphatically defeated that it had to retreat as far as Teanum and to be reorganized there; but the exertions of the active consul succeeded in restoring his army to a serviceable condition even before the arrival of winter, and he reoccupied his old position under the walls of Acerrae, which the Samnite main army under Mutilus continued to besiege.
Combats with the Marsians Defeat and Death of Lupus At the same time operations had also begun in Central Italy, where the revolt of the Abruzzi and the region of the Fucine lake threatened the capital in dangerous proximity.

An independent corps under Gnaeus Pompeius Strabo was sent into Picenum in order that, resting for support on Firmum and Falerio, it might threaten Asculum; but the main body of the Roman northern army took its position under the consul Lupus on the borders of the Latin and Marsian territories, where the Valerian and Salarian highways brought the enemy nearest to the capital; the rivulet Tolenus (Turano), which crosses the Valerian road between Tibur and Alba and falls into the Velino at Rieti, separated the two armies.

The consul Lupus impatiently pressed for a decision, and did not listen to the disagreeable advice of Marius that he should exercise his men--unaccustomed to service--in the first instance in petty warfare.

At the very outset the division of Gaius Perpenna, 10,000 strong, was totally defeated.

The commander-in- chief deposed the defeated general from his command and united the remnant of the corps with that which was under the orders of Marius, but did not allow himself to be deterred from assuming the offensive and crossing the Tolenus in two divisions, led partly by himself, partly by Marius, on two bridges constructed not far from each other.
Publius Scato with the Marsians confronted them; he had pitched his camp at the spot where Marius crossed the brook, but, before the passage took place, he had withdrawn thence, leaving behind the mere posts that guarded the camp, and had taken a position in ambush farther up the river.