of Raphia in 217 during the Fourth Syrian War between Ptolemy IV Philopator of the Kingdom of Egypt and Antiochus III the Great of the Seleucid Empire. Antiochus’ army comprised the 10,000 elite, pike-carrying Silver Shields (Argyraspids) and 20,000 so-called Macedonians, named for their also being armed with sarissai, for a total of 30,000 heavy infantry. The grand army also included 32,000 light-armed troops, including at least 4,500 archers and slingers34 6,000 cavalry and 102 Indian elephants completed the Seleucid force (Polyb. 5.79.3–12). Ptolemy’s forces are more difficult to calculate. Polybius mentions 70,000 infantry, 5,000 cavalry, and 73 elephants (Polyb. 5.79.1). This roughly equates to his description of the creation of the army as consisting of 3,000 royal guards, 2,000 “peltasts,”35 another elite unit of the phalanx, 8,000 Greek mercenaries, an additional 25,000 phalangites, 3,000 Libyans, and 20,000 Egyptians, all equipped in the Macedonian style (Polyb. 5.65.3–5, 8–9). These Egyptians were newly trained to fight alongside the Macedonians. Of the other troops there are listed specifically 700 “house” cavalry, likely heavy, 3,000 native Egyptian and Libyan horse cavalry, 3,000 Cretan archers, 4,000 Thracians and Gauls, and 2,000 others not clearly identified (Polyb. 5.65.5–10). Immediately before the actual battle, Ptolemy’s line, moving from left to right, is described as follows: the royal guard, the peltasts, 3,000 Libyans, the 20,000 Egyptians, and 8,000 Greek mercenaries (Polyb. 5.82.3–6). The 25,000 phalangites noted earlier have apparently disappeared from the narrative. While various solutions to the problems of the Ptolemaic numbers have been suggested,36 the solution may simply be that they stood in the center of the phalanx between the Libyan and the Egyptian phalangites and are not specifically noted. Ptolemy’s force was accompanied by 73 elephants of the African stock (Polyb. 5.84.9). According to Polybius, African elephants could not bear the smell, sound, and sight of their Indian counterparts and consequently were of little use (Polyb. 5. 84.5–6).37
After five days of skirmishing, the two kings arrayed their troops for battle. Both placed their phalangites in the center. The two pike phalanxes would then battle each other (Polyb. 5.82.2) with their flanks covered by light-armed infantry. In front of these light-armed infantry on the wings of both armies were their respective elephant corps and, even further on the wings, their cavalries. At the beginning of the battle, the elephant contingents moved to engage their opposite. Ptolemy’s force on the left retreated in panic and crashed into their own light infantry. Taking advantage of the chaos on the Ptolemaic left, Antiochus defeated the Ptolemaic cavalry and light-armed troops, now in disarray. On the Ptolemaic right the reverse took place with the Ptolemaic commander avoiding the elephants and effectively engaging the enemy’s cavalry and light infantry. Virtually in a vacuum, the two phalanxes engaged one another. The fighting continued until a charge by the sarissa-wielding Ptolemiac phalanx defeated its opponent (Polyb. 5.84–85). Neither cavalry was engaged in the primary struggle between the phalanxes.38
The other change begun by Philip was the developing professionalism of armies. Philip used traditional mercenaries especially for garrison duties, but he also created a professional Macedonian infantry guard, the Hypaspists. During Alexander’s decade-long campaigns the entire Macedonian force became increasingly mercenary in its characteristics and professional in its abilities. The camp had become these people’s home and the army their profession. In the years following the conqueror’s death, armies became mercenary forces fighting for those who were successful and who paid well. In part, in an attempt to cement these soldiers’ loyalty to a particular commander, lands were given out by the Hellenistic kings in return for military service. This was, indeed, similar to the practice instituted by Philip II in his creation of the original pezhetairoi. This practice had cemented the loyalty of Philip’s new infantry and had similar, though diminished, effects on these troops in the new Hellenistic states. Armies were no longer citizen forces called to duty in time of need. The kingdoms of the Hellenistic world maintained professional forces. Initially in the armies of Alexander’s Successors, this change was most noticeable in the proclivity of defeated armies to join the forces of their victors, as seen earlier in the case of Eumenes of Cardia. This practice was ameliorated later since so many of these troops held land back in the territory of their immediate commander where their families resided.
The last great battles of the Hellenistic age were fought against the armies of the Roman Republic at Magnesia in Asia in 190, and at Pydna in Macedonia in 168. In the former, the total Seleucid force was 70,000 strong and represented many different nationalities and fighting styles. This number included the sarissa-bearing phalanx of 16,000 troops (Liv. 37. 40.2; App. Syr. 6.32). These phalangites anchored the center and were divided into ten sections of 1,600 men Syr. 6.32). Interspersed between each section were two elephants (Liv. 37.40.2).39 Covering the entire front of the phalanx were skirmishers (App. Syr. 6.33, 35; cf. Liv. 37.42.3). On the right side of the phalanx, King Antiochus placed in sequence 1,500 Galatian infantry, 3,000 cataphracts, the king’s agema or royal cavalry guard of approximately 1,000 hand-picked Median horsemen equipped with slightly lighter armor than the cataphracts, and an additional mixture of light cavalry drawn from many other nations, supported by 16 elephants.40 After these come the royal infantry guard, the Argyraspides,41 and 1,200 Dahae horse bowmen;42 then, 3,000 Cretan and Trallian light infantry, 2,500 Mysian archers, 4,000 mixed Cyrtaean43 slingers, and Elymaean44 archers covered the flank of this wing. On the left stood another 1,500 Gallicians and 2,000 Cappadocians, 2,700 additional light-armed troops, 3,000 cataphracts, and 1,000 horsemen of the “royal squadron,” traditional heavy cavalry. In front of this body of cavalry were the scythed chariots and a detachment of Arab camel archers. These were followed by Tarentines, 2,500 Gallician cavalry, and 7,000 archers of mixed nationality; then, 4,000 mixed Cyrtaean and Elymaean slingers; and finally 16 elephants (Liv. 37.40.6–14). The ultimate length of this Seleucid front was so large that those in the center could not make out the end of each flank (Liv. 37.41.4).
Unlike their counterparts the Roman army of roughly 30,000 heavy infantry (App. Syr. 6.31) was practically uniform with respect to both men and equipment.45 They were armed with javelins, “short swords,” and protected by helmets, breastplates, greaves, and full-body shields. There were two Roman legions and two legions of Latins and allies, each containing 5,000 men. The Romans occupied the center of the formation with the Latins, their Italian allies, on the wings.46 To the right of the heavy infantry were 3,000 light-armed troops,47 many of these supplied by King Eumenes of Pergamum; then, 3,000 cavalry, 800 of which were furnished by Eumenes, the rest being Romans. Anchoring this wing were 1,000 mercenary light infantry and cavalry.48 On the left were stationed four squadrons of cavalry anchored against a river that was protected by steep banks. Some 2,000 Macedonian and Thracian volunteers guarded the Roman camp.49 The 16 elephants were placed in reserve behind the Roman legions.50 Skirmishers likely covered the fronts of both heavy infantry forces, but are not noted by our sources with respect to the Roman forces.
The battle began with a charge by the Seleucid flanks. On the right their cavalry, commanded by the king, broke through the opposing infantry and cavalry, and made an unsuccessful attack on the Roman camp (Liv. 37.42).51 On the left, the scythed chariots attacked the forces of Eumenes, but that commander ordered the slingers, archers, and other light-armed troops to attack the horses. The battle also began in the midst of a thunderstorm, which further frightened the horses. These, when injured, became unmanageable, and many turned and charged their own ranks, disrupting the cavalry forces on the left, where the scythes were especially effective against the Antiochean cataphracts whose heavy armor made them less maneuverable.52 Eumenes followed this success with a cavalry charge that chased the opposing Seleucid cavalry from the field, thus exposing their phalanx to attack (App. Syr. 34–35; Liv. 37.41.9–12). Antiochus’ attack on the Roman left also ultimately failed through the counterattack by Romans and another part of the Pergamene cavalry under the command of Eumenes’ brother Attalus (Liv. 37.43).
While Eumenes’ assault on the Seleucid right was still in progress, the Romans and their allies charged the Seleucid phalanx, which quickly formed itself into a square to protect its exposed flanks. At first the Romans were pushed back by the sarissai of their opponents, but under attack from the legion’s javelins and the light-armed