(BOOK V. OF THE “COMMENTARIES.”) MARCH AGAINST THE TREVIRI--SECOND DESCENT IN BRITAIN. [Sidenote: Inspection of the Fleet. March against the Treviri.] I. Cæsar, after having appeased the troubles of Illyria, and passed some time in Italy, rejoined the army in the country of the Belgæ, at the beginning of June in the year 700. Immediately on his arrival, he visited all his quarters, and the naval arsenal established, according to Strabo, at the mouth of the Seine.[387] He found his fleet ready for sea. In spite of the scarcity of necessary materials, the soldiers had laboured in building it with the greatest zeal. He rewarded them with commendations, complimented those who had directed the works, and appointed for the general rendezvous the Portus Itius (_Boulogne_). The concentration of the fleet required a considerable length of time, of which Cæsar took advantage to prevent the effects of the agitation which had shown itself among the Treviri. These populations, rebelling against his orders, and suspected of having called the Germans from beyond the Rhine, did not send their representatives to the assemblies. Cæsar marched against them with four legions, without baggage, and 800 cavalry, and left troops in sufficient number to protect the fleet. The Treviri possessed, in addition to a considerable infantry, a more numerous cavalry than any other people in Gaul. They were divided into two factions, whose chiefs, Indutiomarus and his son-in-law Cingetorix, disputed the chief power. The latter was no sooner informed of the approach of the legions, than he repaired to Cæsar, and assured him that he would not fail in his duties towards the Roman people. Indutiomarus, on the contrary, raised troops, and caused to be placed in safety, in the immense forest of the Ardennes, which extended across the country of the Treviri from the Rhine to the territory of the Remi, all those whose age rendered them incapable of carrying arms. But when he saw several chiefs (_principes_), drawn by their alliance with Cingetorix or intimidated by the approach of the Romans, treat with Cæsar, fearing to be abandoned by all, he made his submission. Although Cæsar put no faith in his sincerity, yet, as he did not want to pass the fine season among the Treviri, and as he was desirous of hastening to Boulogne, where all was ready for the expedition into Britain, he was satisfied with exacting 200 hostages, among whom were the son and all the kindred of Indutiomarus, and, after having assembled the principal chiefs, he conferred the authority on Cingetorix. This preference accorded to a rival turned Indutiomarus into an irreconcileable enemy.[388] [Sidenote: Departure for the Isle of Britain.]