However, the delights of victory and of pillage at last brought into full play the Cisalpine Gauls' natural hatred of Rome.

After Ticinus and Trebia, Hannibal had no more zealous and devoted troops.

At the battle of Lake Trasimene he lost fifteen hundred men, nearly all Gauls; at that of Canine he had thirty thousand of them, forming two thirds of his army; and at the moment of action they cast away their tunics and checkered cloaks (similar to the plaids of the Gals or Scottish Highlanders), and fought naked from the belt upwards, according to their custom when they meant to conquer or die.

Of five thousand five hundred men that the victory of Cannae cost Hannibal, four thousand were Gauls.

All Cisalpine Gaul was moved; enthusiasm was at its height; new bands hurried off to recruit the army of the Carthaginian who, by dint of patience and genius, brought Rome within an ace of destruction, with the assistance almost entirely of the barbarians he had come to seek at her gates, and whom he had at first found so cowed and so vacillating.
When the day of reverses came, and Rome had recovered her ascendency, the Gauls were faithful to Hannibal; and when at length he was forced to return to Africa, the Gallic bands, whether from despair or attachment, followed him thither.