Gallic War (5.55-6.1)

But the Triviri and Indutiomarus let no part of the entire winter pass without sending embassadors across the Rhine , importuning the states, promising money, and asserting that, as a large portion of our army had been cut off, a much smaller portion remained. However, none of the German States could be induced to cross the Rhine , since "they had twice essayed it," they said, "in the war with Ariovistus and in the passage of the Tenchtheri there; that fortune was not to be tempted any more." Indutiomarus disappointed in this expectation, nevertheless began to raise troops, and discipline them, and procure horses from the neighboring people, and allure to him by great rewards the outlaws and convicts throughout Gaul. And such great influence had he already acquired for himself in Gaul by these means, that embassies were flocking to him in all directions, and seeking, publicly and privately, his favor and friendship.

When he perceived that they were coming to him voluntarily; that on the one side the Senones and the Carnutes were stimulated by their consciousness of guilt, on the other side the Nervii and the Aduatuci were preparing war against the Romans, and that forces of volunteers would not be wanting to him if he began to advance from his own territories, he proclaims an armed council (this according to the custom of the Gauls in the commencement of war) at which, by a common law, all the youth were wont to assemble in arms, whoever of them comes last is killed in the sight of the whole assembly after being racked with every torture. In that council he declares Cingetorix, the leader of the other faction, his own son-in-law (whom we have above mentioned, as having embraced the protection of Caesar, and never having deserted him) an enemy and confiscates his property. When these things were finished, he asserts in the council that he, invited by the Senones and the Carnutes, and several other states of Gaul, was about to march thither through the territories of the Remi, devastate their lands, and attack the camp of Labienus: before he does that, he informs them of what he desires to be done.

Labienus, since he was confining himself within a camp strongly fortified by the nature of the ground and by art, had no apprehensions as to his own and the legion's danger, but was devising that he might throw away no opportunity of conducting the war successfully. Accordingly, the speech of Indutiomarus, which he had delivered in the council, having been made known [to him] by Cingetorix and his allies, he sends messengers to the neighboring states and summons horse from all quarters: he appoints to them a fixed day for assembling. In the mean time, Indutiomarus, with all his cavalry, nearly every day used to parade close to his [Labienus'] camp; at one time, that he might inform himself of the situation of the camp; at another time, for the purpose of conferring with or of intimidating him. Labienus confined his men within the fortifications, and promoted the enemy's belief of his fear by whatever methods he could.

Since Indutiomarus was daily advancing up to the camp with greater defiance, all the cavalry of the neighboring states which he [Labienus] had taken care to have sent for, having been admitted in one night, he confined all his men within the camp by guards with such great strictness, that that fact could by no means be reported or carried to the Treviri . In the mean while, Indutiomarus, according to his daily practice, advances up to the camp and spends a great part of the day there: his horse cast their weapons, and with very insulting language call out our men to battle. No reply being given by our men, the enemy, when they thought proper, depart toward evening in a disorderly and scattered manner, Labienus unexpectedly sends out all the cavalry by two gates; he gives this command and prohibition, that, when the enemy should be terrified and put to flight (which he foresaw would happen, as it did), they should all make for Indutiomarus, and no one wound any man before he should have seen him slain, because he was unwilling that he should escape, in consequence of gaining time by the delay [occasioned by the pursuit] of the rest. He offers great rewards for those who should kill him: he sends up the cohorts as a relief to the horse. The issue justifies the policy of the man, and since all aimed at one, Indutiomarus is slain, having been overtaken at the very ford of the river, and his head is carried to the camp, the horse, when returning, pursue and slay all whom they can. This affair having been known, all the forces of the Eburones and the Nervii which had assembled, depart; and for a short time after this action, Caesar was less harassed in the government of Gaul.

Caesar, expecting for many reasons a greater commotion in Gaul, resolves to hold a levy by the means of M. Silanus C. Antistius Reginus, and T. Sextius, his lieutenants: at the same time he requested Cn. Pompey, the proconsul, that since he was remaining near the city invested with military command for the interests of the commonwealth, he would command those men whom when consul [55 B.C.] he had levied by the military oath in Cisalpine Gaul, to join their respective corps, and to proceed to him; thinking it of great importance, as far as regarded the opinion which the Gauls would entertain for the future, that that the resources of Italy should appear so great that if any loss should be sustained in war, not only could it be repaired in a short time, but likewise be further supplied by still larger forces. And when Pompey had granted this to the interests of the commonwealth and the claims of friendship, Caesar having quickly completed the levy by means of his lieutenants, after three regiments had been both formed and brought to him before the winter [had] expired, and the number of those cohorts which he had lost under Q. Titurius had been doubled, taught the Gauls, both by his dispatch and by his forces what the discipline and the power of the Roman people could accomplish.