 Liguria and Cisalpine Gaul presented a very suitable ground for Mago’s operations.Despite the victorious campaigns in the Po valley before the outbreak of the Second Punic war and the extensive colonization, Rome did not entirely manage to subjugate the local Gauls.Led by the Insubres and Boii, they rose to arms once again just before the invasion of Hannibal (218 BC) and joined the latter’s army by the thousands.