Rome’s successes at sea in turn set conditions for the Roman invasion of Anatolia, which will lead to the decisive battle at Magnesia, but of course in the midst of our naval narrative, we rolled over into a new year, which means new consuls. The Senate extended Glabrio’s command in Greece to finish the war with the Aetolians, but the war against Antiochus was assigned to Lucius Cornelius Scipio, one of the year’s consuls and brother of Publius Cornelius Scipio Africanus, the victor over Hannibal at Zama (202). There’s an exciting bit of politics behind Scipio getting the assignment (including his famous brother promising to serve as one of his military tribunes), but in a sense that’s neither here nor there. As we’ve seen, Rome has no shortage of capable generals. From here on, if I say “Scipio”, I mean Lucius Cornelius Scipio; if I want his brother, I’ll say “Scipio Africanus”.
Scipio also brought fresh troops with him. The Senate authorized him to raise a supplementum (recruitment to fill out an army) of 3,000 Roman infantry, 100 Roman cavalry, 5,000 socii infantry and 200 socii cavalry (Livy 37.2.1) as well as authorizing him to carry the war into Asia (meaning Anatolia or Asia Minor) if he thought it wise – which of course he will. In addition to this, the two Scipios also called for volunteers from Scipio Africanus’ veterans and got 5,000 of them, a mix of Romans and socii (Livy 37.4.3), so all told Lucius Cornelius Scipio is crossing to Greece with reinforcements of some 13,000 infantry (including some battle-hardened veterans), 300 cavalry and one Publius Cornelius Scipio Africanus.1 That said, a significant portion of this force is going to end up left in Greece to handle garrison duty and the Aetolians. Antiochus III, for his part, spends this time raising forces for a major battle, while dispatching his son Seleucus (the future Seleucus IV, r. 187-175) to try to raid Pergamum, Rome’s key ally in the region.
Once the Romans arrive (and join up with Eumenes’ army), both sides maneuvered to try and get a battle on favorable terms. Antiochus III’s army was massive with lots of cavalry – 62,000 infantry and 12,000 cavalry, an army on the same general order of magnitude as the one that fought at Raphia – so he sought an open area, setting up his fortified camp near Magnesia, with fairly formidable defenses – a ditch with a double-rampart (Livy 37.37.9-11). Unsurprisingly, the Romans, with a significant, but smaller force, preferred a fight in more confined quarters and for several days the armies sat opposite each other with minor skirmishes (Livy 37.38).
The problem Scipio faced was a simple one: the year was coming to a close, which meant that soon new consuls would be elected and he could hardly count on his command being extended. Consequently, Scipio calls together his war council – what the Romans call a consilium – to ask what he should do if Antiochus III couldn’t be lured into battle on favorable terms. The answer he got back was to force a battle and so force a battle Scipio did, advancing forward onto the ground of Antiochus’ choosing, leading to the Battle of Magnesia.
We have two accounts of this battle which mostly match up, one in Livy (Livy 37.39-44) and another in Appian’s Syrian Wars (App. Syr. 30-36). Livy here is generally the better source and chances are both authors are relying substantially on Polybius (who would be an even better source), whose account of the battle is lost.
Antiochus III’s army was enormous, with a substantial superiority in cavalry. From left to right, according to Livy (Livy 37.40), Antiochus III deployed: Cyrtian slinger and Elymaean archers (4,000), then a unit of caetrati (4,000; probably light infantry peltasts), then the contingent of Tralli (1,500; light infantry auxiliaries from Anatolia), then Carian and Cilicians equipped like Cretans (1,500; light archer infantry), then the Neo-Cretans (1,000; light archer infantry), then the Galatian cavalry (2,500; mailed shock cavalry), then a unit of Tarantine cavalry (number unclear, probably 500; Greek light cavalry), a part of the “royal squadron” of cavalry (1,000; Macedonian shock cavalry), then the ultra-heavy cataphract cavalry (3,000), supported by a mixed component of auxiliaries (2,700; medium thureophoroi infantry?) along with his scythed chariots and Arab camel troops.
That gets us to the central component of the line (still reading left to right): Cappadocians (2,000) who Livy notes were similarly armed to the Galatian infantry (1,500, unarmored, La Tène infantry kit, so “mediums”) who come next. Then the main force of the phalanx, 16,000 strong with 22 elephants. The phalanx was formed 32 ranks deep, with the intervals between the regiments covered by the elephants deployed in pairs, creating an articulated or enallax phalanx like Pyrrhus had, but using elephants rather than infantry to cover the “hinges”. This may in fact, rather than being a single phalanx 32 men deep be a “double” phalanx (one deployed behind the other) like we saw at Sellasia. Then on the right of the phalanx was another force of 1,500 Galatian infantry. Oddly missing here is the main contingent of the elite Silver Shields (the Argyraspides); some scholars2 note that a contingent of them 10,000 strong would make Livy’s total strength numbers and component numbers match up and he has just forgotten them in the main line. We might expect them to be deployed to the right of the main phalanx (where Livy will put the infantry Royal Cohort (regia cohors), confusing a subunit of the argyraspides with the larger whole unit. Michael Taylor in a forthcoming work3 has suggested they may also have been deployed behind the cavalry we’re about to get to or otherwise to their right.
That gets us now to the right wing (still moving left to right; you begin to realize how damn big this army is), we have more cataphracts (3,000, armored shock cavalry), the elite cavalry agema (1,000; elite Mede/Persian cavalry, probably shock), then Dahae horse archers (1,200; Steppe horse archers), then Cretan and Trallian light infantry (3,000), then some Mysian Archers (2,500) and finally another contingent of Cyrtian slinger and Elymaean archers (4,000).
This is, obviously, a really big army. But notice that a lot of its strength is in light infantry: combining the various archers, slingers and general light infantry (excluding troops we suspect to be “mediums”) we come to something like 21,500 lights, plus another 7,700 “medium” infantry and then 26,000 heavy infantry (accounting for the missing argyraspides). That’s 55,200 total, but Livy reports a total strength for the army of 62,000; it’s possible the missing remainder were troops kept back to defend the camp, in which case they too are likely light infantry. A Roman army’s infantry contingent is around 28% “lights” (the velites), who do not occupy any space in the main battle line. Antiochus’ infantry contingent, while massive, is 39% “lights” (and another 14% “mediums”), some of which do seem to occupy actual space in the battle line.
Of course Antiochus also has a massive amount of cavalry ranging from ultra-heavy cataphracts to light but highly skilled horse archers and massive cavalry superiority covereth a multitude of sins.
But the second problem with this gigantic army is one that – again, in a forthcoming work – Michael Taylor has pointed out. The physical space of the battlefield at Magnesia is not big enough to deploy the whole thing […]
Now Livy specifies that the flanks of Antiochus’ army curve forward, describing them as “horns” (cornu) rather than “wings” (alae) and noting they were “a little bit advanced” (paulum producto), which may be an effort to get more of this massive army actually into the fight […]. So while this army is large, it’s also unwieldy and difficult to bring properly into action and it’s not at all clear from either Livy or Appian that the whole army actually engaged – substantial portions of that gigantic mass of light infantry on the wings just seem to dissolve away once the battle begins, perhaps never getting into the fight in the first place.
The Roman force was deployed in its typical formation, with the three lines of the triplex acies and the socii flanking the legions (Livy 37.39.7-8), with the combined Roman and socii force being roughly 20,000 strong (the legions and alae being somewhat over-strength). In addition Eumenes, King of Pergamum was present and the Romans put his force on their right to cover the open flank, while he anchored his left flank on the Phrygios River. Eumenes’ wing consisted of 3,000 Achaeans (of the Achaean League) that Livy describes as caetrati and Appian describes as peltasts (so, lights), plus nearly all of Scipio’s cavalry: Eumenes’ cavalry guard of 800, plus another 2,200 Roman and socii cavalry, and than some auxiliary Cretan and Trallian light infantry, 500 each. Thinking his left wing, anchored on the river, relatively safe, Scipio posted only four turmae of cavalry there (120 cavalry). He also had a force of Macedonians and Thracians mixed together – so these are probably “medium” infantry – who had come as volunteers, who he posts to guard the camp rather than in the main battleline. I always find this striking, because I think a Hellenistic army would have put these guys in the front line, but a Roman commander looks at them and thinks “camp guards”. The Romans also had some war elephants, sixteen of them, but Scipio assesses that North African elephants won’t stand up to the larger Indian elephants of the Seleucids (which is true, they won’t) and so he puts them in reserve behind his lines rather than out front where they’d just be driven back into him. All told then, the Roman force is around 26,000 infantry and 3,000 cavalry – badly outnumbered by Antiochus, but of a relatively higher average quality and a bit more capable of actually fitting its entire combat power into the space.
The Battle
Because the armies are so large, much like as happened at Raphia, the battle that results is almost three battles running in parallel: the two wings and the center. Antiochus III commanded from his right wing, where – contrary to the expectations of Scipio who thought the river would secure his flank there – he intended his main attack. His son Seleucus commanded the left. Livy reports a light rain which interfered with both with visibility and some of Antiochus’ light troops’ weapons, as their bows and slings reacted poorly to the moisture (as composite bows will sometimes do; Livy 37.41.3-4, note also App. Syr. 33).Antiochus opens the battle on his left with his scythed chariots, a novel “gimmick” weapon (heavy chariots with blades all over them, used to shock infantry out of position). This may have been a nasty surprise for the Romans, but given the dispositions of the army, it was Eumenes, not Scipio who faces the chariots and as Livy notes, Eumenes was well aware how to fight them (Livy 37.41.9), using his light troops – those Cretan archers and Trallian javelin-troops. Deployed in loose order, they were able to move aside to avoid the chariots better than heavy infantry in close-order (similar tactics are used against elephants) and could with their missiles strike at chariot drivers and horses at range (Livy 37.41.10-12). Turning back this initial attack seems to have badly undermined the morale of the Seleucid left-wing, parts of which fled, creating a gap between the extreme left-wing and the heavy cavalry contingent. Eumenes then, with the Roman cavalry, promptly hammered the disordered line, hitting first the camel troops, then in the confusion quickly overwhelming the rest of the cavalry, including the cataphracts, leading Antiochus’ left wing to almost totally collapse, isolating the phalanx in the center. It’s not clear what the large mass of light infantry on the extreme edge of the battlefield was doing.
Meanwhile on the other side of the battle, where Scipio had figured a light screen of 120 equites would be enough to hold the end of the line, Antiochus delivered is cavalry hammer-blow successfully. Obnoxiously, both of our sources are a lot less interested in describing how he does this (Livy 37.42.7-8 and App. Syr. 34), which is frustrating because it is a bit hard to make sense of how it turns out. On the one hand, the constricted battlefield will have meant that, regardless of how they were positioned, those argyraspides are going to end up following Antiochus’ big cavalry hammer on the (Seleucid) right. They then overwhelm the cavalry and put them to flight and then push the infantry of that wing (left ala of socii and evidently a good portion of the legion next to it) back to the Roman camp.
On the other hand, the Roman infantry line reaches its camp apparently in good order or something close to it. Marcus Aemilius, the tribune put in charge of the camp is able to rush out, reconstitute the infantry force and, along with the camp-guard, halt Antiochus’ advance. The thing is, infantry when broken by cavalry usually cannot reform like that, but the distance covered, while relatively short, also seems a bit too long for the standard legionary hastati-to-principes-to-triarii retrograde. Our sources (also including a passage of Justin, a much later source, 31.8.6) vary on exactly how precipitous the flight was and it is possible that it proceeded differently at different points, with some maniples collapsing and others making an orderly retrograde. In any case, it’s clear that the Roman left wing stabilized itself outside of the Roman camp, much to Antiochus’ dismay. Eumenes, having at this point realized both that he was winning on his flank and that the other flank was in trouble dispatched his brother Attalus with 200 cavalry to go aid the ailing Roman left wing; the arrival of these fellows seem to have caused panic and Antiochus at this point begins retreating.
Meanwhile, of course, there is the heavy infantry engagement at the center. Pressured and without flanking support, Appian reports that the Seleucid phalanx first admitted what light infantry remained and then formed square, presenting their pikes tetragonos, “on all four sides” (App. Syr. 35), a formation known as a plinthion in some Greek tactical manuals. Forming this way under pressure on a chaotic battlefield is frankly impressive (though if they were formed as a double-phalanx rather than a double-thick single-phalanx, that would have made it easier) and a reminder that the core of Antiochus’ army was quite capable. Unable in this formation to charge, the phalanx was showered with Roman pila and skirmished by Eumenes’ lighter cavalry; the Romans seem to have disposed of Antiochus’ elephants with relative ease – the Punic Wars had left the Romans very experienced at dealing with elephants (Livy 37.42.4-5). Appian notes that some of the elephants, driven back by the legion and maddened disrupted the Seleucid square, at which point the phalanx at last collapsed (App. Syr. 35); Livy has the collapse happen much faster, but Appian’s narrative here seems more plausible.
What was left of Antiochus’ army now fled to their camp – not far off, just like the Roman one – leading to a sharp battle at the camp which Livy describes as ingens et maior prope quam in acie cades, “a huge slaughter, almost greater than that in the battle” (Livy 37.43.10), with stiff resistance at the camp’s gates and walls holding up the Romans before they eventually broke through and butchered the survivors. Livy reports that of Antiochus’ forces, 50,000 infantry and 3,000 cavalry were killed, another 1,500 captured; these seem really high as figures go, but Appian reports almost the exact same. Interesting, Livy doesn’t report the figure in his own right or attribute it to Polybius but instead simply notes “it is said that”, suggesting he may not be fully confident of the number either. Taylor supposes, reasonably I think, that this oversized figure may also count men who fled from the battlefield, reflecting instead that once Antiochus III could actually reconstitute his army, he had about 19,000 men, most of the rest having fled.4 Either way, the resulting peace makes clear that the Seleucid army was shattered beyond immediate repair.
Roman losses, by contrast, were shockingly light. Livy reports 300 infantry lost, 24 Roman cavalry and 25 out of Eumenes’ force; Appian adds that the 300 infantry were “from the city” – meaning Roman citizens – so some socii casualties have evidently been left out (but he trims Eumenes’ losses down to just fifteen cavalry) (Livy 37.44.2-3; App. Syr. 36). Livy in addition notes that many Romans were wounded in addition to the 300 killed. This is an odd quirk of Livy’s casualty reports for Roman armies against Hellenistic armies and I suspect it reflects the relatively high effectiveness of Roman body armor, by this point increasingly dominated by the mail lorica hamata: good armor converts lethal blows into survivable wounds.5 It also fits into a broader pattern we’ve seen: Hellenistic armies that face Roman armies always take heavy casualties, winning or losing, but when Roman armies win they tend to win lopsidedly. It is a trend that will continue.
So why Roman victory at Magnesia? It is certainly not the case that the Romans had the advantage of rough terrain in the battle: the battlefield here is flat and fairly open. It should have been ideal terrain for a Hellenistic army.
A good deal of the credit has to go to Eumenes, which makes the battle a bit hard to extrapolate from. It certainly seems like Eumenes’ quick thinking to disperse the Seleucid chariots and then immediately follow up with his own charge was decisive on his flank, though not quite battle winning. Eumenes’ forces, after all, lacked the punch to disperse the heavier phalanx, which did not panic when its wing collapsed. Instead, the Seleucid phalanx, pinned into a stationary, defensive position by Eumenes’ encircling cavalry, appears to have been disassembled primary by the Roman heavy infantry, peppering it with pila before inducing panic into the elephants. It turns out that Samnites make better “glue” for an articulated phalanx than elephants, because they are less likely to panic.
Meanwhile on the Seleucid right (the Roman left), the flexible and modular nature of the legion seems to have been a major factor. Antiochus clearly broke through the Roman line at points, but with the Roman legion’s plethora of officers (centurions, military tribunes, praefecti) and with each maniple having its own set of standards to rally around, it seems like the legion and its socii ala managed to hold together and eventually drive Antiochus off, despite being pressured. That, in and of itself, is impressive: it is the thing the Seleucid center fails to do, after all.
Bret Devereaux, “Collections: Phalanx’s Twilight, Legion’s Triumph, Part IVb: Antiochus III”, A Collection of Unmitigated Pedantry, 2024-04-05.
1. I enjoy this joke because the idea of bringing Scipio Africanus along as a junior officer is amusing, but I should note that in the event, he doesn’t seem to have had much of a role in the campaign.
2. E.g. Bar Kockva, The Seleucid Army: Organization and Tactics in the Great Campaigns (1979)
3. “A Commander Will Put an End to his Insolence: the Battle of Magnesia, 190BC” to appear in The Seleucids at War: Recruitment, Organization and Battles (forthcoming in 2024), eds. Altay Coşkun and Benhamin E. Scolnic.
4. Taylor, Antiochus the Great (2013), 143.
5. On this, see, uh, me, “The Adoption and Impact of Roman Mail Armor in the Third and Second Centuries B.C.” Chiron 52 (2022).
March 1, 2025
QotD: Roman Republic versus Seleucid Empire – the Battle of Magnesia
February 23, 2025
QotD: The Hellenistic army system as a whole
No battle is a perfect “model” battle, but the Battle of Raphia (217BC) is handy for this because we have the two most powerful Hellenistic states (the Ptolemies and Seleucids) both bringing their A-game with very large field armies and deploying in a fairly standard pattern. That said, there are some quirks to note immediately: Raphia is our only really good order of battle of the Ptolemies, but as our sources note there is an oddity here, specifically the mass deployment of Egyptians in the phalanx. As I noted last time, there had always been some ethnic Egyptians (legal “Persians”) in the phalanx, but the scale here is new. In addition, as we’ll see, the position of Ptolemy IV himself is odd, on the left wing matched directly against Antiochus III, rather than on his own right wing as would have been normal. But this is mostly a fairly normal setup and Polybius gives us a passably good description (better for Ptolemy than Antiochus, much like the battle itself).
We can start with the Seleucid Army and the tactical intent of the layout is immediately understandable. Antiochus III is modestly outnumbered – he is, after all, operating far from home at the southern end of the Levant (Raphia is modern-day Rafah at the southern end of Gaza), and so is more limited in the force he can bring. His best bet is to make his cavalry and elephant superiority count and that means a victory on one of the wings – the right wing being the standard choice. So Antiochus stacks up a 4,000 heavy cavalry hammer on his flank behind 60 elephants – Polybius doesn’t break down which cavalry, but we can assume that the 2,000 with Antiochus on the extreme right flank are probably the cavalry agema and the Companions, deployed around the king, supported by another 2,000 probably Macedonian heavy cavalry. He then uses his Greek mercenary infantry (probably thureophoroi or perhaps some are thorakitai) to connect that force to the phalanx, supported by his best light skirmish infantry: Cretans and a mix of tough hill folks from Cilicia and Caramania (S. Central Iran) and the Dahae (a steppe people from around the Caspian Sea).
His left wing, in turn, seems to be much lighter and mostly Iranian in character apart from the large detachment of Arab auxiliaries, with 2,000 more cavalry (perhaps lighter Persian-style cavalry?) holding the flank. This is a clearly weaker force, intended to stall on its wing while Antiochus wins to the battle on the right. And of course in the middle [is] the Seleucid phalanx, which was quite capable, but here is badly outnumbered both because of how full-out Ptolemy IV has gone in recruiting for his “Macedonian” phalanx and also because of the massive infusion of Egyptians.
But note the theory of victory Antiochus III has: he is going to initiate the battle on his right, while not advancing his left at all (so as to give them an easier time stalling), and hope to win decisively on the right before his left comes under strain. This is, at most, a modest alteration of Alexander-Battle.
Meanwhile, Ptolemy IV seems to have anticipated exactly this plan and is trying to counter it. He’s stacked his left rather than his right with his best troops, including his elite infantry (the agema and peltasts, who, while lighter, are more elite) and his best cavalry, supported by his best (and only) light infantry, the Cretans.1 Interestingly, Polybius notes that Echecrates, Ptolemy’s right-wing commander waits to see the outcome of the fight on the far side of the army (Polyb. 6.85.1) which I find odd and suggests to me Ptolemy still carried some hope of actually winning on the left (which was not to be). In any case, Echecrates, realizing that sure isn’t happening, assaults the Seleucid left.
I think the theory of victory for Ptolemy is somewhat unconventional: hold back Antiochus’ decisive initial cavalry attack and then win by dint of having more and heavier infantry. Indeed, once things on the Ptolemaic right wing go bad, Ptolemy moves to the center and pushes his phalanx forward to salvage the battle, and doing that in the chaos of battle suggests to me he always thought that the matter might be decided that way.
In the event, for those unfamiliar with the battle: Antiochus III’s right wing crumples the Ptolemaic left wing, but then begins pursuing them off of the battlefield (a mistake he will repeat at Magnesia in 190). On the other side, the Gauls and Thracians occupy the front face of the Seleucid force while the Greek and Mercenary cavalry get around the side of the Seleucid cavalry there and then the Seleucid left begins rolling up, with the Greek mercenary infantry hitting the Arab and Persian formations and beating them back. Finally, Ptolemy, having escaped the catastrophe on his left wing, shows up in the center and drives his phalanx forward, where it wins for what seem like obvious reasons against an isolated Seleucid phalanx it outnumbers almost 2-to-1.
But there are a few structural features I want to note here. First, flanking this army is really hard. On the one hand, these armies are massive and so simply getting around the side of them is going to be difficult (if they’re not anchored on rivers, mountains or other barriers, as they often are). Unlike a Total War game, the edge of the army isn’t a short 15-second gallop from the center, but likely to be something like a mile (or more!) away. Moreover, you have a lot of troops covering the flanks of the main phalanx. That results, in this case, in a situation where despite both wings having decisive actions, the two phalanxes seem to be largely intact when they finally meet (note that it isn’t necessarily that they’re slow; they seem to have been kept on “stand by” until Ptolemy shows up in the center and orders a charge). If your plan is to flank this army, you need to pick a flank and stack a ton of extra combat power there, and then find a way to hold the center long enough for it to matter.
Second, this army is actually quite resistive to Alexander-Battle: if you tried to run the Issus or Gaugamela playbook on one of these armies, you’d probably lose. Sure, placing Alexander’s Companion Cavalry between the Ptolemaic thureophoroi and Gallic mercenaries (about where he’d normally go) would have him slam into the Persian and Medean light infantry and probably break through. But that would be happening at the same time as Antiochus’ massive 4,000-horse, 60-elephant hammer demolished Ptolemaic-Alexander’s left flank and moments before the 2,000 cavalry left-wing struck Alexander himself in his flank as he advanced. The Ptolemaic army is actually an even worse problem, because its infantry wings are heavier, making that key initial cavalry breakthrough harder to achieve. Those chunky heavy-cavalry wings ensure that an effort to break through at the juncture of the center and the wing is foolhardy precisely because it leaves the breakthrough force with heavy cavalry to one side and heavy infantry to the other.
I know this is going to cause howls of pain and confusion, but I do not think Alexander could have reliably beaten either army deployed at Raphia; with a bit of luck, perhaps, but on the regular? No. Not only because he’d be badly outnumbered (Alexander’s army at Gaugamela is only 40,000 infantry and 7,000 cavalry) but because these armies were adapted to precisely the sort of army he’d have and the tactics he’d use. Even without the elephants (and elephants gave Alexander a hell of a time at the Hydaspes), these armies can match Alexander’s heavy infantry core punch-for-punch while having enough force to smash at least one of his flanks, probably quite quickly. Note that the Seleucid Army – the smaller one at Raphia – has almost exactly as much heavy infantry at Raphia as Alexander at Gaugamela (30,000 to 31,000), and close to as much cavalry (6,000 to 7,000), but of course also has a hundred and two elephants, another 5,000 more “medium” infantry and massive superiority in light infantry (27,000 to 9,000). Darius III may have had no good answer to the Macedonian phalanx, but Antiochus III has a Macedonian phalanx and then essentially an entire second Persian-style army besides (and his army at Magnesia is actually more powerful than his army at Raphia).
This is not a degraded form of Alexander’s army, but a pretty fearsome creature of its own, which supplements an Alexander-style core with larger amounts of light and medium troops (and elephants), without sacrificing much, if any, in terms of heavy infantry and cavalry. The tactics are modest adjustments to Alexander-Battle which adapt the military system for symmetrical engagements against peer armies. The Hellenistic Army is a hard nut to crack, which is why the kingdoms that used them were so successful during the third century, to the point that, until the Romans show up, just about the only thing which could beat a Hellenistic army was another Hellenistic army.
Bret Devereaux, “Collections: Phalanx’s Twilight, Legion’s Triumph, Part Ib: Subjects of the Successors”, A Collection of Unmitigated Pedantry, 2024-01-26.
1. You can tell how much those Cretans are valued, given that they get placed in key positions in both armies.
February 17, 2025
QotD: Decisive factors in the Roman victory over the Seleucids
Ironically for a post covering land battles, the most important factor may be naval: Rome’s superior naval resources (and better naval allies), which gave the Romans an enormous operational advantage against Antiochus. In the initial phase, the Romans could get more troops to Greece than the king could, while further on, Roman naval supremacy allowed Roman armies to operate in Anatolia in force (while Antiochus, even had he won in Greece, had no hope of operating in Italy). Neutralizing Antiochus’ navy both opened up options for the Romans and closed down options for Antiochus, setting the conditions for Roman victory. It would have also neutered any Roman defeat. If Antiochus wins at Magnesia, he cannot then immediately go on the offensive, after all: he has merely bought perhaps a year or two of time to rebuild his navy and try to contest the Aegean again. Given the astounding naval mobilizations Rome had shown itself capable of in the third century, one cannot imagine Antiochus was likely to win that contest.
Meanwhile, the Romans had better allies, in part as a consequence of the Romans being better at getting allies. The Romans benefit substantially from allied Achaean, Pergamese and Rhodian ships and troops, as well as support from the now-humbled Philip V of Macedon and even supplies and auxiliaries from Numidia and Carthage. Alliance-management is a fairly consistent Roman strength and it shows here. It certainly seems to help that Roman protestations that they had little interest in a permanent presence in Greece seem to have been somewhat true; Rome won’t set up a permanent provincia in Macedonia until 146 (though the Romans do expect their influence to predominate before then). By contrast, Antiochus III, clearly bent on rebuilding Alexander’s empire, was a more obvious threat to the long-term independence and autonomy of Greek states like the Pergamum or Rhodes.
Finally, there is the remarkable Seleucid glass jaw. The Romans, after all, sustained a defeat very much like Magnesia against Hannibal in 216 (the Battle of Cannae) and kept fighting. By contrast, Antiochus is forced into a humiliating peace after Magnesia, in which he cedes all of Anatolia, gives up any kind of navy and is forced to pay a crippling financial indemnity which will fatally undermine the reign of his successor and son Seleucus IV (leading to his assassination in 175, leading to yet further Seleucid weakness). Part of this glass jaw may have been political: after Magnesia, Antiochus’ own aristocrats seem pretty well done with their king’s adventurism against Rome.
But at the same time, some of it was clearly military. Antiochus didn’t have a second army to fall back on and Magnesia represented essentially a peak “all-call” Seleucid mobilization. A similar defeat at Raphia had forced a similarly unfavorable peace earlier in his reign, after all. Part of the problem, I would argue, is that the Seleucids needed their army for more than just war: they needed it to enforce taxation and tribute on their own recalcitrant subjects. As a result, no Seleucid king could afford to “go for broke” the way the Roman Republic could, nor could the Seleucids ever fully mobilize the massive population of their realm. The very nature of the Hellenistic kingdom’s ethnic hierarchy made fully tapping the potential resources of the kingdom impossible.
As a result, while Antiochus III was not an incompetent general, he ruled a deceptively weak giant. Massive revenues were offset by equally massive security obligations and the Seleucids seem to have been perenially cash strapped (with a nasty habit of looting temples to make up for it). The very nature of the Seleucid Empire – like the Ptolemaic one – as an ethnic empire where Macedonians ruled and non-Macedonians were ruled kept Antiochus from being able to fully mobilize his subjects. It may also explain why so many of those light infantry auxiliaries seem to have run off without much of a fight. Eumenes and his Pergamese troops fought for their independence, the Romans for the greater glory of Rome and the socii for their own status and loot within the Roman system, but what could Antiochus offer a subjected Carian or Cilician except a paycheck and a future of continued subjugation? That’s not much to die for.
Bret Devereaux, “Collections: Phalanx’s Twilight, Legion’s Triumph, Part IVb: Antiochus III”, A Collection of Unmitigated Pedantry, 2024-04-05.
November 29, 2024
Greek History and Civilization, Part 8 – The Hellenistic Age
seangabb
Published Jul 17, 2024This eighth lecture in the course covers the Hellenistic Age of Greece — from the death of Alexander in 323 BC to about the death of Cleopatra in 30 BC.
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July 21, 2023
QotD: War elephant weaknesses against Roman troops
So today we’re going to ask, “why?” We’ve answered that question in the immediate term – to quote Trautmann (2015) on the point, “the Roman refusal of the war elephant … was based upon a low estimate of its value” (250). To put another way, they thought they sucked. We know elephants could be quite potent in battle, so the answer must be a touch more complicated. We’ll look at this two ways: first (because it’s me) in terms of logistics, and then in terms of anti-elephant tactics, to see why elephants could not succeed against (or with) Rome. I am also going to speculate – just a touch – on which of these factors might explain the other major area elephant warfare did not penetrate: China.
Roman Elephants
But first, a necessary caveat to an objection no doubt already brewing in the minds of some: but didn’t the Romans use elephants sometimes? Yes, though Roman employment of elephants was at best uneven (this is a point, I’d like to note, where Trautmann (2015) shows its value over, for instance, J. M. Kistler’s War Elephants (2006) – the latter’s reading of Roman use of war elephants bends the evidence to serve an argument, rather than the other way around). Nevertheless, the Romans did use war elephants during the last two centuries of the Republic.The Romans had some war elephants (just 20) at Cynocephelae (197 B.C.) against Macedon – these had been drawn from the kingdom of Numidia, which had sided with Rome against Carthage in the Second Punic War. Plutarch (Flam. 8.2-5) leaves the animals out of the battle narrative, but Livy (who is the better source; Liv. 33.9) notes their use to break up the Macedonian right wing, which was not yet even in fighting formation. It’s not clear the elephants were necessary for the Roman victory here and the key action was actually a flanking attack by infantry.
The Romans brought elephants to Magnesia (190 B.C.), but left them in reserve; the Romans only had a few, whereas their Seleucid opponents had brought many more. Moreover, the Roman elephants were smaller African elephants, effectively useless against the large Asian elephants the Seleucids used. Pydna (168 B.C.) against the Macedonians again, is harder to assess because the sources for it are poor (part of Livy’s narrative of the battle is mostly lost). Plutarch (Aem. 19-22) leaves the elephants out again, whereas Livy notes that Perseus’ dedicated elephant-fighting corps was ineffective in fighting the Roman elephants on the right wing, but attributes success there to the socii infantry rather than the elephants (Liv. 44.41.4-6). Kistler reads this as a notable elephant success, but Livy does not say this, instead crediting the socii on the right and the legions breaking up the Macedonian center.
The Romans did find elephants useful in places like Spain or southern Gaul (modern Provence) where just a handful could bewilder and terrify opponents completely unused to and unprepared for them. The last gasp of true Roman war elephants came in 46 B.C., where Julius Caesar defeated a Roman army led by Metellus Scipio which had sixty elephants in it. The elephants lost and one of Caesar’s legions (my personal favorite, Legio V Alaudae (Larks!)) took the elephant as a legionary symbol in commemoration of having beaten them.
So absolutely yes, the Romans of the Middle and Late Republic made some use of war elephants, but it was hardly a distinguished run. As Trautmann notes – quite correctly, in my view – the Romans were always more interested in ways to defeat elephants than to use them.
Bret Devereaux, “Collections: War Elephants, Part II: Elephants against Wolves”, A Collection of Unmitigated Pedantry, 2019-08-02.
