Cæsar, with one legion and with a division of horsemen, arrived just in time to save the beleaguered garrison. The Gauls were severely handled when the Romans pushed through their lines to reach Cicero’s camp. The news of the relief caused dejection among the other Gallic tribes, who were about to attack isolated Roman garrisons. Labienus alone had trouble with the Treviri, but managed to ward off the blow, inflicting upon them in turn a crushing defeat, and slaying their leader, Indutiomar. The rest of the winter and summer campaign was spent in various expeditions directed against the Gallic tribes whose loyalty was suspected. It was designed to make a special example of the Eburones, who had cut off the Roman legion the preceding year. They were doomed to destruction, and the neighboring tribes were invited to come and enjoy the plunder. Some of those who came preferred to attack the Romans first, and Cicero’s camp again fared badly by a sudden raid, made by the Sigambri, a German tribe, who had crossed the Rhine, invited by the prospect of plundering the Gauls. This mistake confused the whole original scheme, and it resulted in the escape of the leader of the Eburones, Ambiorix, an implacable foe of Rome. When the winter of 53-52 came on, Cæsar’s sojourn in the Cisalpine province was passed during a season of much anxiety. Rome had been disturbed by factional fights between Clodius and his opponent, Milo, in which the popular demagogue met his death. There had been a drawing together of the senatorial party, and Pompeius, who was now looked upon as the chief bulwark against anarchy, had been intrusted by the Senate with extraordinary powers, enabling him to call for a general levy of men of military age throughout Italy. Julia, the wife of Pompeius, was dead, and with her vanished the one strong personal link between the two triumvirs, for Crassus had perished in the East fighting against the Parthians. The news of the troubles in Italy spread rapidly in Gaul, causing the restless tribes there to believe that Cæsar would be kept on the southern side of the Alps, and that, with the commander-in-chief away, there would be no trouble in bringing about a successful revolt, provided there were common action throughout the whole country. The essential condition was to unite all the Gauls against Roman control, and this had already in a large measure been accomplished by the king of the great tribe of the Arverni, Vercingetorix, now at the head of a confederation extending over the whole of the central part of the country. It was difficult to overcome the particularistic tendencies of the Gauls, but this new chieftain at least understood the difficulties and made a brave effort to counteract them. He showed also a sense of the strategical needs of the situation by advising the Gauls to make use of their superiority in cavalry and to cut off the Roman communications; another feature of his scheme was