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.
But whether it was that they had got together the whole strength out of every community in Samnium, or that their courage was stimulated by the thought that their very existence as a nation depended upon this battle, they certainly did succeed in creating a good deal of alarm in the Roman ranks, even though they were fighting in a fair field.
When Fabius saw that the enemy were holding their ground in every part of the field, he rode up to the first line with his son, Maximus, and Marcus Valerius, both
military tribunes, and ordered them to go to the cavalry and tell them that if they remembered any single occasion on which the republic had been aided by the efforts of the
cavalry, they should that day strive their utmost to sustain the reputation of that invincible arm of the State, for the enemy were standing immovable against the infantry and all their hopes rested on the cavalry.