 Complete the following phrase:  Although, throughout the Hellenistic era, more importance was usually given to the role of the infantry than to cavalry, most major battles of the era were gained because of good or bad cavalry performance. Antigonus was defeated at Ipsus, because his victorious cavalry failed to return from the pursuit before the 400 enemy elephants effectively blocked its way back. Antiochus was defeated at Raphia, when, engaging in pursue of the defeated enemy cavalry, he failed to return and charge the enemy phalanx. At the Battle of Cynoscephalae, the Aetolian cavalry played a key role in the battle and at Pydna, the Macedonian lancers suddenly left the battlefield allowing the Romans to surround and massacre Perseus phalanx. At 