 The fighting was fierce, and made especially noteworthy by the actions of the Roman and Etruscan cavalry.The Roman cavalry broke through the Etruscan lines, and began pursuing the soldiers as they fled, while Tolumnius at the head of the Etruscan horse valiantly opposed them in the defense of his soldiers.The outcome of the battle was in doubt until Aulus Cornelius Cossus, one of the military tribunes serving in the cavalry, charged at the king and unhorsed him.