 Complete the following phrase:  The Hellenistic armies based their strength on the pike-bearing phalanx, the legacy of Philip II and Alexander the Great. Throughout the age of the Diadochi and the Epigonoi, the phalanx, as the line of the pikemen was commonly referred to by ancient authors, remained the backbone of armies as diverse as those of Antiochos III and Philip V. The phalanx was an infantry formation, characterized by dense ranks and pikes sarissas. Their soldiers known as phalangites ranged from professional warriors, drilled in tactics, weapon use and formation, typically of Greek origin, to basically trained, non-Greek villagers, as was the case in the army of Ptolemy Philopator, the victor of Raphia. Certain reforms in the weight of the phalangite equipment and the conscription methods used, turned the phalanx from a maneuverable formation into a bulky, slow moving steam roller, whose charge no enemy was able to withstand. Maneuvers like the fake retreat of Phillip II at Chaeronea or the oblique advance of Alexander at 