La cavalleria pesante regolare romana, i catafratti, era distribuita in egual misura tra le quattro armate, ognuna impiegante la sua fanteria all'avanguardia e la cavalleria come riserva nella retroguardia. ###>The Roman regular heavy cavalry, the cataphract, was distributed equally among the four armies, each army deploying its infantry at the forefront and its cavalry as a reserve in the rear.