The Portonaccio Sarcophagus, ca 190 Ad (Not related to Caesars wars). Full version here.
"A shout being raised by both sides, it was succeeded by a general shout along the ramparts and whole line of fortifications. Our troops, laying aside their javelins, carry on the engagement with their swords. The cavalry is suddenly seen in the rear of the Gauls; the other cohorts advance rapidly; the enemy turn their backs; the cavalry intercept them in their flight, and a great slaughter ensues. Sedulius the general and chief of the Lemovices is slain; Vergasillaunus the Arvernian, is taken alive in the flight, seventy-four military standards are brought to Caesar, and few out of so great a number return safe to their camp."
Caesar - De Bello Gallico VII 88.2-4
Translated by W. A. McDevitte and W. S. Bohn