Concerning the battle which was fought with them Caesar says in his Commentaries B. G. iv. 13 . that the Barbarians, while treating with him under a truce, attacked on their march and therefore routed his five thousand cavalry with their eight hundred, since his men were taken off their guard; that they then sent other envoys to him who tried to deceive him again, but he held them fast and led his army against the Barbarians, considering that good faith towards such faithless breakers of truces was folly. But Tanusius says that when the senate voted sacrifices of rejoicing over the victory, Cato pronounced the opinion that they ought to deliver up Caesar to the Barbarians, thus purging away the violation of the truce in behalf of the city, and turning the curse therefor on the guilty man. Of those who had crossed the Rhine into Gaul four hundred thousand were cut to pieces, and the few who succeeded in making their way back were received by the Sugambri, a German nation.