However, Vercingetorix would not do that. From a personal standpoint, he absolutely would not allow these Romans, who had plundered Gaul lands, to leave unscathed; and from the perspective of achieving his goals, he needed to eliminate these Roman Armies still lingering in Gaul one by one, to ignite the Gaul's spirit, restore their glory, and force the tribes to unite, continuing to fight Rome to the death. As the initiator of this war and the one who first eliminated the Roman Army, he would inevitably become a leader respected by all the Gaul tribes!
Of course, doing so was also to win the trust of the Nix Kingdom, as he still needed the continued support of the Nix people to lead the Gaul people to defeat the Romans and achieve true independence.
Having thought all this through, Vercingetorix was already prepared and began to take action upon learning of the Nix Kingdom's involvement.