 The discovery of this treaty inevitably led to the outbreak of the First Macedonian War (214–205 BC) between Rome and its Greek allies against Macedonia.Having left Spain for Italy to wage war against Rome, thus causing the Second Punic War, Hannibal garnered victory after victory in a series of lightning battles against the legions of the burgeoning Italic power.With the help of his brothers Hasdrubal and Mago, his brother-in-law Hasdrubal the Fair, as well as other Carthaginian commanders, Hannibal managed to keep the Iberian front battling, which forced the Romans to redirect manpower away from the Italic front.