Ab urbe condita
Titus Livius (Livy)
Livy. History of Rome, Volumes 1-2. Roberts, Canon, Rev, translator. London, New York: J. M. Dent and Sons; E. P. Dutton and Co., 1912.
All these were concentrating at the Samnite camp. When the news of this sudden rising reached Rome, L. Volumnius had already left for Samnium with the second and third legions and 15,000 allied troops; it was therefore decided that Appius Claudius should at the earliest possible moment enter Etruria. Two Roman legions followed him, the first and fourth, and 12,000 allies.
He fixed his camp not far from the enemy.