Hasdrubal, alarmed by the shout of the cavalry, sprang out of his tent, and, perceiving a tumult before the rampart, and his own troops in a state of hurry and confusion, the standards of the legions gleaming at a distance, and the plain filled with the enemy, immediately sent out the whole body of his cavalry against the horsemen of the enemy; marching himself out of the camp, at the head of the infantry, without departing at all from the usual arrangement in forming his line.

The battle between the cavalry had continued for a long time doubtful; nor could they decide it themselves, because, when repulsed, which was the case in a manner alternately, they had a safe retreat upon the line of infantry.

But when the armies were not more than five hundred paces distant from each other, Scipio, sounding a retreat and opening his files, received into the midst of them the whole body of his cavalry and light-armed troops; and dividing them into two parts, placed them in reserve behind the wings.

After this, when it was now time to commence the battle, he ordered the Spaniards, who formed the centre, to advance at a slow pace; he himself sent a messenger from the right wing, for that he commanded, to Silanus and Marcius to extend the wing on the left in the same manner as they should see him extend that on the right, and engage the enemy with the light-armed of the horse and foot, before the two centres could meet.

The wings being thus extended, they advanced against the enemy at a rapid pace, with three cohorts of infantry, and three troops of horse, each with the addition of skirmishers, the rest following them in an oblique line.