Companion Cavalry is a type of heavy cavalry unit available to the Macedonians in Rome: Total War: Alexander.
Description[]
The Companion, or hetaroi, cavalry are recruited from the nobility and are a military elite. Equipped with protective cuirasses and wielding the xyston, a long stabbing spear which is double-ended to enable them to fight on should the shaft shatter. The military reforms of Alexander's father Philip altered the function of the cavalry from merely screening the army's flanks to a more proactive role. The development of the devastatingly penetrative wedge formation completed the transformation. Typically Alexander opened battles by manoeuvering his cavalry before crashing into the resulting gaps in the enemy line to create mayhem.
The Companion's mobility and the impact of their charge complements the slower Macedonian infantry perfectly and makes them the hammer of Alexander's army!