They decided, therefore, to bring on an action. They posted their cavalry on the two flanks of their army with instructions to keep their attention on their camp, in case it were attacked, rather than on the battle, which would be safe in the hands of the infantry.

On the other side, the consul Sulpicius directed the right wing, Poetilius the left. The Roman right was drawn up in more open order than usual, as the Samnites opposed to them were standing in thinly extended ranks in order either to surround the enemy or to prevent themselves from being surrounded.