C. Julius Caesar, Gallic War

These things being finished, and the assizes being concluded, he returns into Hither Gaul, and proceeds thence to the army. When he had arrived there, having made a survey of the winter quarter, he finds that, by the extraordinary ardor of the soldiers, amid the utmost scarcity of all materials, about six hundred ships of that kind which we have described above and twenty-eight ships of war, had been built, and were not far from that state, that they might be launched in a few days. Having commended the soldiers and those who had presided over the work, he informs them what he wishes to be done, and orders all the ships to assemble at port Itius, from which port he had learned that the passage into Britain was shortest, [being only] about thirty miles from the continent. He left what seemed a sufficient number of soldiers for that design; he himself proceeds into the territories of the Treviri with four legions without baggage, and 800 horse, because they neither came to the general diets [of Gaul], nor obeyed his commands, and were moreover, said to be tampering with the Germans beyond the Rhine .