Gallic War (4.3-4.7)

They esteem it their greatest praise as a nation, that the lands about their territories lie unoccupied to a very great extent, inasmuch as [they think] that by this circumstance is indicated, that a great number of nations can not withstand their power; and thus on one side of the Suevi the lands are said to lie desolate for about six hundred miles. On the other side they border on the Ubii, whose state was large and flourishing, considering the condition of the Germans, and who are somewhat more refined than those of the same race and the rest [of the Germans], and that because they border on the Rhine , and are much resorted to by merchants, and are accustomed to the manners of the Gauls, by reason of their approximity to them. Though the Suevi, after making the attempt frequently and in several wars, could not expel this nation from their territories, on account of the extent and population of their state, yet they made them tributaries, and rendered them less distinguished and powerful [than they had ever been].

In the same condition were the Usipetes and the Tenchtheri (whom we have mentioned above), who, for many years, resisted the power of the Suevi, but being at last driven from their possessions, and having wandered through many parts of Germany , came to the Rhine , to districts which the Menapii inhabited, and where they had lands, houses, and villages on either side of the river. The latter people, alarmed by the arrival of so great a multitude, removed from those houses which they had on the other side of the river, and having placed guards on this side the Rhine , proceeded to hinder the Germans from crossing. They, finding themselves, after they had tried all means, unable either to force a passage on account of their deficiency in shipping, or cross by stealth on account of the guards of the Menapii, pretended to return to their own settlements and districts; and, after having proceeded three days' march, returned; and their cavalry having performed the whole of this journey in one night, cut off the Menapii, who were ignorant of, and did not expect [their approach, and] who, having moreover been informed of the departure of the Germans by their scouts, had, without apprehension, returned to their villages beyond the Rhine . Having slain these, and seized their ships, they crossed the river before that part of the Menapii, who were at peace in their settlements over the Rhine , were apprized of [their intention]; and seizing all their houses, maintained themselves upon their provisions during the rest of the winter.

Caesar, when informed of these matters, fearing the fickle disposition of the Gauls, who are easily prompted to take up resolutions, and much addicted to change, considered that nothing was to be intrusted to them; for it is the custom of that people to compel travelers to stop, even against their inclination, and inquire what they may have heard, or may know, respecting any matter; and in towns the common people throng around merchants and force them to state from what countries they come, and what affairs they know of there. They often engage in resolutions concerning the most important matters, induced by these reports and stories alone; of which they must necessarily instantly repent, since they yield to mere unauthorized reports; and since most people give to their questions answers framed agreeably to their wishes.

Caesar, being aware of their custom, in order that he might not encounter a more formidable war, sets forward to the army earlier in the year than he was accustomed to do. When he had arrived there, he discovered that those things, which he had suspected would occur, had taken place; that embassies had been sent to the Germans by some of the states, and that they had been entreated to leave the Rhine , and had been promised that all things which they desired should be provided by the Gauls. Allured by this hope, the Germans were then making excursions to greater distances, and had advanced to the territories of the Eburones and the Condrusi, who are under the protection of the Treviri . After summoning the chiefs of Gaul, Caesar thought proper to pretend ignorance of the things which he had discovered; and having conciliated and confirmed their minds, and ordered some cavalry to be raised, resolved to make war against the Germans.

Having provided corn and selected his cavalry, he began to direct his march toward those parts in which he heard the Germans were. When he was distant from them only a few days' march, embassadors came to him from their state, whose speech was as follows: "That the Germans neither make war upon the Roman people first, nor do they decline, if they are provoked, to engage with them in arms; for that this was the custom of the Germans handed down to them from their forefathers, -to resist whatsoever people make war upon them and not to avert it by entreaty; this, however, they confessed,-that they had come hither reluctantly, having been expelled from their country. If the Romans were disposed to accept their friendship, they might be serviceable allies to them; and let them either assign them lands, or permit them to retain those which they had acquired by their arms; that they are inferior to the Suevi alone, to whom not even the immortal gods can show themselves equal; that there was none at all besides on earth whom they could not conquer."