Minucius, elated with his elevation, proposed to Fabius either that they should command the whole army on alternate days, or each should permanently command one-half. Fabius chose the latter alternative, for he felt certain that the impetuosity of his colleague would sooner or later get him into trouble with such an adversary as Hannibal, and that it was better to risk the destruction of half the army than of the whole.

Minucius withdrew the troops allotted to him, and encamped in the plains at a distance of a mile and a half from Fabius. Hannibal resolved at once to take advantage of the change, and to tempt the Romans to attack him by occupying a hill which lay about halfway between the camp of Minucius and Geronium.

The plain which surrounded the hill was level and destitute of wood, but Hannibal on a careful examination found that there were several hollows in which troops could be concealed, and in these during the night he posted five thousand infantry and five hundred cavalry. The position occupied by them was such that they would be able to take the Romans in flank and rear should they advance against the hill. Having made these dispositions he sent forward a body of light troops in the morning to occupy the hill. Minucius immediately despatched his light troops, supported by cavalry, to drive them from it. Hannibal reinforced his Carthaginians by small bodies of troops, and the fight was obstinately maintained until Minucius, whose blood was now up, marched towards the hill with his legions in order of battle.