Ariovistus, instead of accepting them, put forward his own claims: "He had only crossed the Rhine at the prayer of the Gauls; the lands which he was accused of having seized, had been ceded to him; he had subsequently been attacked, and had scattered his enemies; if he has sought the friendship of the Roman people, it is in the hope of benefiting by it; if it becomes prejudicial to him, he renounces it; if he has carried so many Germans into Gaul, it is for his personal safety; the part he occupies belongs to him, as that occupied by the Romans belongs to them; his rights of conquest are older than those of the Roman army, which had never passed the limits of the province. Cæsar is only in Gaul to ruin it. If he does not withdraw from it, he will regard him as an enemy, and he is certain that by his death he shall gain the gratitude of a great number of the first and most illustrious personages in Rome. They have informed him by their messengers that, at this price, he would gain their good-will and friendship. But if he be left in free possession of Gaul, he will assist in all the wars that Cæsar may undertake."
Cæsar insisted on the arguments he had already advanced: "It was not one of the principles of the Republic to abandon its allies; he did not consider that Gaul belonged to Ariovistus any more than to the Roman people. When formerly Q. Fabius Maximus vanquished the Arverni and the Ruteni, Rome pardoned them, and neither reduced them to provinces nor imposed tribute upon them. If, then, priority of conquest be invoked, the claims of the Romans to the empire of Gaul are the most just; and if it be thought preferable to refer to the Senate, Gaul ought to be free, since, after victory, the Senate had willed that she should preserve her own laws."
During this conversation, information was brought to Cæsar that the cavalry of Ariovistus were approaching the knoll, and were throwing stones and darts at the Romans. Cæsar immediately broke up the conference, withdrew to his escort, and forbade them to return the attack, not from fear of an engagement with his favourite legion, but in order to avoid, in case he should defeat his enemies, the suspicion that he might have taken advantage of their good faith to surprise them in an interview. Nevertheless, the arrogance of Ariovistus, the disloyal attack of his cavalry, and the rupture of the conference, were soon known, and excited the ardour and impatience of the Roman troops.