 However, Hasdrubal Barca had already ordered the armies of Indibilis and Mandonius (Iberian chieftains friendly to the Carthaginians) and Hasdrubal Gisco to join Mago near Castulo.Hasdrubal Barca held his ground against Gnaeus Scipio, staying within his fortified camp, then managed to bribe the Celt-Iberian mercenaries to desert Gnaeus Scipio.This led to Hasdrubal's army outnumbering that of Gnaeus Scipio.