This expedition so rapidly terminated, the legions returned to their winter quarters. At the beginning of spring, Cæsar convoked, according to his custom, the general assembly of Gaul, which met, no doubt, at Amiens. The different peoples sent thither their representatives, with the exception of the Senones, the Carnutes, and the Treviri. He regarded this absence as a sign of revolt, and in order to pursue his designs without neglecting the general affairs, he resolved to transfer the assembly nearer to the insurrection, to Lutetia. This town belonged to the Parisii, who bordered on the Senones, and although formerly these peoples had formed but one, the Parisii do not appear to have entered into the conspiracy. Cæsar, having announced this decision from the summit of his prætorium (_pro suggestu pronuntiata_), started the same day at the head of his legions, and advanced by forced marches towards the country of the Senones. At the news of his approach, Acco, the principal author of the revolt, ordered the population to retire into the _oppida_; but, taken by surprise by the arrival of the Romans, the Senones employed the Ædui, once their patrons, to intercede in their favour. Cæsar pardoned them without difficulty, preferring to employ the fine season in war than in the search of those who were culpable. A hundred hostages exacted from the Senones were entrusted to the Ædui. The Carnutes imitated the example of the Senones, and, by the intermediation of the Remi, whose clients they were, obtained their pardon. Cæsar pronounced the close of the assembly of Gaul, and ordered the different states to furnish their contingents of cavalry.[448] [Sidenote: Submission of the Menapii.]