C. Julius Caesar, Gallic War

He therefore sends T. Labienus, his lieutenant, with the cavalry to the Treviri , who are nearest to the river Rhine . He charges him to visit the Remi and the other Belgians, and to keep them in their allegiance and repel the Germans (who were said to have been summoned by the Belgae to their aid,) if they attempted to cross the river by force in their ships. He orders P. Crassus to proceed into Aquitania with twelve legionary cohorts and a great number of the cavalry, lest auxiliaries should be sent into Gaul by these states, and such great nations be united. He sends Q. Titurius Sabinus his lieutenant, with three legions, among the Unelli, the Curiosolitae, and the Lexovii, to take care that their forces should be kept separate from the rest. He appoints D. Brutus, a young man, over the fleet and those Gallic vessels which he had ordered to be furnished by the Pictones and the Santoni, and the other provinces which remained at peace; and commands him to proceed toward the Veneti, as soon as he could. He himself hastens thither with the land forces.