صدربعل جيسكو
Although Hasdrubal nominally commanded all Carthaginian forces in the Iberian Peninsula (the Roman Hispania), Mago received an independent command, a division that was to have grave consequences later. The two Barca brothers, aided by Hasdrubal Gisco, battled the Romans under the command of the Scipio brothers (Gnaeus Cornelius Scipio Calvus and Publius Cornelius Scipio) throughout 215–212 BC. Mago, in a cavalry ambush of Publius Cornelius Scipio, killed 2,000 Romans near Akra Leuke in 214 BC, and also aided in keeping the Hispanic tribes loyal to Carthage. On the whole, the Carthaginians managed to maintain the balance of power in Hispania despite the efforts of the Scipios, but failed to send any aid to Hannibal. The situation was favorable enough, as in 212 BC Hasdrubal managed to cross over to Africa with an army to crush the rebellion of Syphax, king of Numidian tribes, without the Scipios causing any disruptions in Hispania. Mago and Hasdrubal Gisco guarded the Carthaginian possessions in Iberia without difficulty, despite the Scipios outnumbering their armies during the absence of Hasdrubal.