That support however, which seemed the most secure, namely the sending of reinforcements from Spain, had been frustrated by the boldness and firmness of the Roman general sent thither, Gnaeus Scipio.

After Hannibal's passage of the Rhone Scipio had sailed for Emporiae, and had made himself master first of the coast between the Pyrenees and the Ebro, and then, after conquering Hanno, of the interior also (536).

In the following year (537) he had completely defeated the Carthaginian fleet at the mouth of the Ebro, and after his brother Publius, the brave defender of the valley of the Po, had joined him with a reinforcement of 8000 men, he had even crossed the Ebro, and advanced as far as Saguntum.

Hasdrubal had indeed in the succeeding year (538), after obtaining reinforcements from Africa, made an attempt in accordance with his brother's orders to conduct an army over the Pyrenees; but the Scipios opposed his passage of the Ebro, and totally defeated him, nearly at the same time that Hannibal conquered at Cannae.

The powerful tribe of the Celtiberians and numerous other Spanish tribes had joined the Scipios; they commanded the sea, the passes of the Pyrenees, and, by means of the trusty Massiliots, the Gallic coast also.