Last time, we finished our look at the third-century successes of the phalanx with the career of Pyrrhus of Epirus, concluding that even when handled very well with a very capable body of troops, Hellenistic armies struggled to achieve the kind of decisive victories they needed against the Romans to achieve strategic objectives. Instead, Pyrrhus was able to achieve a set of indecisive victories (and a draw), which was simply not anywhere close to enough in view of the tremendous strategic depth of Rome.
Well, I hope you got your fill of Hellenistic armies winning battles because it is all downhill from here (even when we’re fighting uphill). For the first half of the second century, from 200 to 168, the Romans achieve an astounding series of lopsided victories against both (Antigonid) Macedonian and Seleucid Hellenistic armies, while simultaneously reducing several other major players (Pergamon, Egypt) to client states. And unlike Pyrrhus, the Romans are in a position to “convert” on each victory, successfully achieving their strategic objectives. It was this string of victories, so shocking in the Greek world, that prompted Polybius to write his own history, covering the period from 264 to 146 to try to explain what the heck happened (much of that history is lost, but Polybius opens by suggesting that anyone paying attention to the First Punic War (264-241) ought to have seen this coming).
That said, this series of victories is complex. Of the five major engagements (The River Aous, Cynoscephalae, Thermopylae, Magnesia, and Pydna) Rome commandingly wins all of them, but each battle is strange in its own way. So we’re going to look at each battle and also take a chance to lay out a bit of the broader campaigns, asking at each stage why does Rome win here? Both in the tactical sense (why do they win the battle) and also in the strategic sense (why do they win the war).
We’re going to start with the war that brought Rome truly into the political battle royale of the Eastern Mediterranean, the Second Macedonian War (200-196). Rome was acting, in essence, as an interloper in long-running conflicts between the various successor dynasties of Alexander the Great as well as smaller Greek states caught in the middle of these larger brawling empires. Briefly, the major players are the Ptolemaic Dynasty, in Egypt (the richest state), the Seleucid Dynasty out of Syria and Mesopotamia (the largest state) and the Antigonid Kingdom in Macedonia (the smallest and weakest state, but punching above its weight with the best man-for-man army). The minor but significant players are the Attalid dynasty in Pergamon, a mid-sized Hellenistic power trapped between the ambitions of the big players, two broad alliances of Greek poleis in the Greek mainland the Aetolian and Achaean Leagues, and finally a few freewheeling poleis, notably Athens and Rhodes. The large states are trying to dominate the system, the small states trying to retain their independence and everyone is about to get rolled by the Romans.
Bret Devereaux, “Collections: Phalanx’s Twilight, Legion’s Triumph, Part IVa: Philip V”, A Collection of Unmitigated Pedantry, 2024-03-15.
February 10, 2025
QotD: The Roman Republic versus the heirs of Alexander the Great
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