to dominate an entire country from end to end, there is no need to bankrupt yourself stuffing every city with garrisons. it is enough to weave a legal web that forces the subjugated to fund, out of their own pockets, the wars of the very power that subjugates them. that, in broad strokes, is what rome built in italy from 272 bce onward, the year tarentum surrendered and the peninsula fell, in effect, into her hands.
the date is worth pinning down with care. tarentum, the great greek city of the south, had called on king pyrrhus of epirus for help, and for five years he dealt the legions defeats so costly that we still call them “pyrrhic”. but pyrrhus eventually sailed away around 275, and in 272 the city capitulated without him; rhegium, the last greek holdout, would fall a few years later. it was not, then, a lightning expulsion of “the greeks” in a single day, as the story is sometimes told, but the slow closing of a long contest. what matters is the result: for the first time a single power commanded the whole of the italian boot, from the apennines to the ionian sea.
the senate grasped at once an elementary danger. if it pressed all the subjugated peoples alike and with the same harshness, it handed them a common reason to rebel all at once. the solution was the opposite of uniform treatment: a deliberately unequal ladder of status. at the very top, the civitas optimo iure, full citizenship with the right to vote, reserved for a few. below it, the civitas sine suffragio, a half-citizenship — with legal protection and roman obligations, but no vote in rome. alongside ran the nomen latinvm, the latin right, which granted certain communities the legal right to trade and marry with romans and the chance to rise to full citizenship. and at the base, the vast majority: the socii, “allies” bound one by one by individual treaties, each with its own clauses.
the masterstroke was not to charge more, but to charge in a currency no one could refuse to pay: men.
for here lies the piece that popular accounts tend to trample. rome did not squeeze her allies with great tributes in coin; the socii, in fact, were subject to no regular tribute at all, something extraordinary among the empires of antiquity. what she demanded of them was a blood tax. each community appeared on a list — the formula togatorvm — that set how many soldiers it had to supply for each campaign the senate launched, equipped and paid out of its own purse; rome provided only the grain. according to polybius, the allies furnished as much infantry as rome herself and up to three times the cavalry, so that in any consular army the italians were at least half the troops. in exchange, the allies shared in part of the movable booty, but the conquered lands passed into the ager publicus and the formal distributions — colonies and viritane allotments — were reserved for roman citizens and latins, an exclusion that a century and a half later would feed the social war. the system turned war into the great shared business: fighting alongside rome paid better than rebelling against her.
the lock on the whole structure was the colonies. wherever a people proved dangerous, rome confiscated land and planted on it a colony of latin right, settled with her own poorer citizens. these colonies were not merely a reward for the settlers: they were sentinels. they stood driven in among the socii like watchful forts, ready to raise the alarm and to contain any attempt at union. the italian who received his neighbour’s land knew that his only life insurance was rome; he had everything to lose and nothing to gain by going over to the enemy. loyalty, then, was not asked for: it was made profitable and watched over at the same time.
now the historiographical nuance, which is best not skipped. the phrase “divide et impera” — divide and conquer — was no roman motto: it appears in no ancient source and is a modern label that historians project onto rome to name the effect of the system. and the system itself, that tidy ladder of citizens, half-citizens, latins and allies, is to a large degree our own reconstruction. henrik mouritsen warns that under a single label — the civitas sine suffragio, for instance — very different cases were heaped together, and that the orderly grid we handle owes much to the late authors who schematised what was in its day a fabric of fluid pacts, negotiated city by city. what is well documented is the underlying logic. tim cornell summed it up without mercy: the roman alliance worked like “a criminal organisation that compensates its victims by enrolling them in the gang and inviting them to share in the proceeds of future robberies”.
the result was a reserve of men without rival in the mediterranean. when in 225 bce rome counted all those who could bear arms, the sum of citizens and allies reached figures that terrified any enemy: she could lose a whole army and raise another the following year. that depth — not tactical genius, but the sheer capacity to keep recruiting after each disaster — was what, a generation later, would let her absorb the catastrophe of cannae against hannibal and still refuse to surrender. but first, with this seemingly inexhaustible source of italian soldiers, the senate stopped looking at the mountains at home and lifted its gaze towards the sea. on the far side of the strait, in sicily, waited the foremost naval power in the world. rome was about to cross the water and discover that her iron net had a limit: it ended at the shore.
