 The Hellenistic generals were well aware of this fact and thus did not deploy them before or among their battle line, as was the case in Hydaspes or in Zama, both examples of how routing elephants could cost the battle.Instead, they were deployed on the wings, where they could keep the enemy cavalry at bay, protecting the infantry from a cavalry outflank.Against them, the enemy would use his own elephants, a necessity, since cavalry would never be able to conquer them.