Gallic War

While these things are being performed by Caesar, the Treviri , having drawn together large forces of infantry and cavalry, were preparing to attack Labienus and the legion which was wintering in their territories, and were already not further distant from him than a journey of two days, when they learn that two legions had arrived by the order of Caesar. Having pitched their camp fifteen miles off, they resolve to await the support of the Germans. Labienus, having learned the design of the enemy, hoping that through their rashness there would be some opportunity of engaging, after leaving a guard of five cohorts for the baggage, advances against the enemy with twenty-five cohorts and a large body of cavalry, and, leaving the space of a mile between them, fortifies his camp. There was between Labienus and the enemy a river difficult to cross, and with steep banks: this neither did he himself design to cross, nor did he suppose the enemy would cross it. Their hope of auxiliaries was daily increasing. He [Labienus] openly says in a council that "since the Germans are said to be approaching, he would not bring into uncertainty his own and the army's fortunes, and the next day would move his camp at early dawn." These words are quickly carried to the enemy, since out of so large a number of cavalry composed of Gauls, nature compelled some to favor the Gallic interests. Labienus, having assembled the tribunes of the soldiers and principal centurions by night, states what his design is, and, that he may the more easily give the enemy a belief of his fears, he orders the camp to be moved with greater noise and confusion than was usual with the Roman people. By these means he makes his departure [appear] like a retreat. These things, also, since the camps were so near, are reported to the enemy by scouts before daylight.

Scarcely had the rear advanced beyond the fortifications when the Gauls, encouraging one another "not to cast from their hands the anticipated booty, that it was a tedious thing, while the Romans were panic-stricken, to be waiting for the aid of the Germans, and that their dignity did not suffer them to fear to attack with such great forces so small a band, particularly when retreating and encumbered," do not hesitate to cross the river and give battle in a disadvantageous position. Labienus suspecting that these things would happen, was proceeding quietly, and using the same pretense of a march, in order that he might entice them across the river. Then, having sent forward the baggage some short distance and placed it on a certain eminence, he says, "Soldiers, you have the opportunity you have sought: you hold the enemy in an encumbered and disadvantageous position: display to us, your leaders, the same valor you have ofttimes displayed to your general: imagine that he is present and actually sees these exploits." At the same time he orders the troops to face about toward the enemy and form in line of battle, and, dispatching a few troops of cavalry as a guard for the baggage, he places the rest of the horse on the wings. Our men, raising a shout, quickly throw their javelins at the enemy. They, when, contrary to their expectation, they saw those whom they believed to be retreating, advance toward them with threatening banners, were not able to sustain even the charge, and, being put to flight at the first onslaught, sought the nearest woods; Labienus pursuing them with the cavalry, upon a large number being slain, and several taken prisoners, got possession of the state a few days after; for the Germans, who were coming to the aid of the Treviri , having been informed of their flight, retreated to their homes. The relations of Indutiomarus, who had been the promoters of the revolt, accompanying them, quitted their own state with them. The supreme power and government were delivered to Cingetorix, whom we have stated to have remained firm in his allegiance from the commencement.

Caesar, after he came from the territories of the Menapii into those of the Treviri , resolved for two reasons to cross the Rhine ; one of which was, because they had sent assistance to the Treviri against him; the other, that Ambiorix might not have a retreat among them. Having determined on these matters, he began to build a bridge a little above that place where he had before conveyed over his army. The plan having been known and laid down, the work is accomplished in a few days by the great exertion of the soldiers. Having left a strong guard at the bridge on the side of the Treviri , lest any commotion should suddenly arise among them, he leads over the rest of the forces and the cavalry. The Ubii, who before had sent hostages and come to a capitulation, send embassadors to him, for the purpose of vindicating themselves, to assure him that "neither had auxiliaries been sent to the Treviri from their state, nor had they violated their allegiance;" they entreat and beseech him "to spare them, lest, in his common hatred of the Germans, the innocent should suffer the penalty of the guilty: they promise to give more hostages, if he desire them." Having investigated the case, Caesar finds that the auxiliaries had been sent by the Suevi; he accepts the apology of the Ubii, and makes the minute inquiries concerning the approaches and the routes to the territories of the Suevi.

In the mean time he is informed by the Ubii, a few days after, that the Suevi are drawing all their forces into one place, and are giving orders to those nations which are under their government to send auxiliaries of infantry and of cavalry. Having learned these things, he provides a supply of corn, selects a proper place for his camp, and commands the Ubii to drive off their cattle and carry away all their possessions from the country parts into the towns, hoping that they, being a barbarous and ignorant people, when harassed by the want of provisions, might be brought to an engagement on disadvantageous terms: he orders them to send numerous scouts among the Suevi, and learn what things are going on among them. They execute the orders, and, a few days having intervened, report that all the Suevi, after certain intelligence concerning the army of the Romans had come, retreated with all their own forces and those of their allies, which they had assembled, to the utmost extremities of their territories: that there is a wood there of very great extent, which is called Bacenis; that this stretches a great way into the interior, and, being opposed as a natural barrier, defends from injuries and incursions the Cherusci against the Suevi, and the Suevi against the Cherusci: that at the entrance of that forest the Suevi had determined to await the coming up of the Romans.