Between 340 and 264 BC Rome beat every people in peninsular Italy, and what it did with them afterwards is the single most consequential decision in its history.
The previous lesson left a city whose political system pushed ambitious men towards war. This one follows them out of the gates. The military narrative matters less than the settlement that followed each victory, because the settlement is what turned conquest into strength rather than into a permanent policing problem. Almost every ancient state that won a war took land, tribute and slaves. Rome took soldiers.
Beating the neighbours
The bare sequence is quickly told. The Latin cities, Rome's own kin and long-standing allies, revolted and were defeated in the Latin War of 340 to 338 BC. Three wars against the Samnites, the tough highland confederation of the central Apennines, ran from 343 to 290 with a long middle phase that included Rome's worst humiliation, the surrender at the Caudine Forks in 321. A coalition of Samnites, Etruscans, Umbrians and Gauls was broken at Sentinum in 295. Finally Tarentum, a Greek city on the southern coast, called in King Pyrrhus of Epirus, who beat Roman armies at Heraclea in 280 and Ausculum in 279 at a cost that gave us the phrase for a victory not worth having, and lost at Beneventum in 275. Tarentum fell in 272.
Two things in that list are worth pausing on. Rome lost repeatedly, at the Caudine Forks, at Heraclea, at Ausculum, and kept fighting, which is a fact about its political system as much as its army. And Pyrrhus, a professional Hellenistic king with the best army in the western Mediterranean, beat the Romans twice and still could not finish them, because they came back the following year with fresh men.
The settlement of 338
The Latin War ended with a decision that had no obvious precedent. Rome dissolved the Latin League and refused to replace it with a new one. Instead it made a separate arrangement with every community, and forbade them to deal with each other. The arrangements came in grades.
Some towns received full Roman citizenship, with the vote and every legal right, and simply stopped being independent states. Others received citizenship without the vote, civitas sine suffragio: their people were Romans for private law, marriage, contract and inheritance, they owed military service, and they had no say in Roman elections. Latin status covered old Latin towns and the new Latin colonies, and carried the right to trade and marry with Romans and to become a Roman citizen by moving to Rome. Everyone else became an ally, a socius, bound to Rome by a treaty of its own, keeping local self-government and its own laws, owing troops and nothing else: no tribute in money, and no Roman governor.
Look at what that list does. It offers something at every level, from full membership down to a treaty that leaves a town running its own affairs, and it makes advancement possible, since Latin status leads to citizenship. It gives the local elites a reason to prefer Rome to their neighbours. And it converts each defeat into an obligation to send soldiers, so that every war produced the means to fight the next one.
Example. Why was citizenship without the vote attractive to Rome, rather than an obvious insult?
Because it solved both halves of the problem at once. Rome wanted manpower and did not want the assemblies filling with men it could not manage, and this status delivers the first without the second: full obligation to serve, full protection in private law, no political weight. For the receiving community it was not nothing, since Roman private law and the protection of Roman power had real value to a landowning class with local rivals. The design is legible for what it is, a graded membership with duties at the bottom and rights at the top, and it also contains the germ of the Social War, because a status that is tolerable in 338 for towns near Rome becomes intolerable in 91 BC for half of Italy after two centuries of fighting Rome's wars.
Now you. The allies owed troops and paid no tribute. What does the absence of tribute imply about how Rome's Italian system was financed?
Answer
That it was financed in kind, by service, and that Rome's expansion had to pay for itself out of booty and land rather than out of revenue. An ally equipped and largely fed its own contingent, so an army cost Rome much less than its size suggests, and the reward for both parties came out of what was taken. That builds in a bias towards continuing the wars, since a system funded by plunder is uncomfortable in peace, and it explains the shock of the second century when provinces outside Italy were taxed in money instead: the two halves of the empire were financed on opposite principles.
Colonies and roads
The settlements were held in place by two physical instruments.
Colonies were new towns planted on confiscated land at chosen points, populated by Roman and Latin settlers who received plots. They were garrisons that fed themselves, and they were substantial: Livy and Dionysius give settler numbers such as 2,500 for Cales in 334 BC, 6,000 for Alba Fucens in 303, and 20,000 for Venusia in 291, planted in the middle of Samnite country. By 218 BC around thirty Latin colonies formed a net across the peninsula, each one a piece of Rome inside somebody else's territory, with its own land, walls and loyalty.
Roads connected them. The Via Appia, begun by the censor Appius Claudius in 312 BC, ran from Rome to Capua, 132 Roman miles, about 195 km, and was later pushed to Brundisium on the heel of Italy. Roman roads were not built for trade. They were built so that an army could move to a colony in days rather than weeks, in any weather, and their construction is dated by the wars they served.
Counting the manpower
The result can be measured, and Polybius measured it. Faced with a Gallic invasion in 225 BC, the Senate called for returns of men able to bear arms from Rome and every ally, and Polybius reproduces the lists: Romans and Campanians at about 250,000 foot and 23,000 horse, and a grand total for Rome and its Italian allies of over 700,000 foot and 70,000 horse.
Take the figure carefully. It is not an army; it is a register of men of military age who could in principle be called. Modern work, above all Peter Brunt's Italian Manpower, has argued over what the numbers counted and concluded that they are of roughly the right order while being neither a census nor a reliable total. Even discounted, the order of magnitude is the point. Athens at its height had something like 40,000 adult male citizens. Rome's citizen body alone was several times that, and the Italian pool behind it was of the order of eighteen times the Athenian figure.
That is the resource that the rest of this course keeps returning to. It is why a state can lose three armies to Hannibal and field a fourth, and it is why the Hellenistic kingdoms, whose greatest set-piece battles put perhaps 70,000 men on a side after months of preparation, lost to a city that could put comparable numbers into a single day's fighting and replace them.
Example. Polybius gives a legion as 4,200 foot and 300 horse, and says the allies supplied infantry equal to the Roman infantry and cavalry at three times the Roman number. Work out a standard consular army of two legions and its allied share.
Roman foot: . Allied foot equal to it: 8,400. Roman horse: . Allied horse at three times that: 1,800. The whole force is men, of whom 10,200 are allies, which is 53 per cent. So more than half of a normal Roman army was not Roman, and three-quarters of its cavalry was not Roman. Hold on to that figure: it is the arithmetic that makes the Italian allies' demand for citizenship in 91 BC something other than a request.
Now you. At Cannae in 216 BC, Polybius says Rome fielded eight legions at strength, with allied contingents. Estimate the infantry, and say what the estimate assumes.
Answer
Eight legions at 4,200 gives 33,600 Roman foot, and allied infantry on the standard ratio matches it, for about 67,000 infantry, plus cavalry. Polybius in fact reports the legions raised to 5,000 each and gives about 80,000 foot and 6,000 horse in total, which is in the same region. The assumptions are that units were at full paper strength and that the standard allied ratio held for that campaign, and both are the kind of thing an army in its third year of a losing war fails to satisfy. The point of the calculation is not the exact figure but the scale: this was the largest army Rome had ever assembled, and roughly half of it was allied.
What the system cost the allies
It is easy to present all this as a story of Roman generosity, and Roman writers did. The allies' side of the ledger is worth stating plainly.
An ally supplied and paid for troops for as long as Rome wanted them, in wars it had no part in choosing, and after 200 BC those wars were increasingly overseas and long. It received a share of booty, but the general who divided it was Roman. It had no vote in the assemblies that declared the wars. Its magistrates could be humiliated by a passing Roman official, and the surviving complaints from the second century BC about the treatment of Italian notables by Roman magistrates are bitter and specific.
Meanwhile the rewards of the empire flowed disproportionately to Rome: land distributions to Roman citizens, the grain distributions later, the tax immunity of 167 BC. Allies who had fought in the same battle line watched the citizen half of the army receive what the allied half did not.
Example. Rome's system is often praised as an unprecedented generosity in extending citizenship. What is the strongest evidence against reading it that way?
The Social War of 91 to 88 BC, in which most of Italy took up arms specifically to obtain the citizenship, and which Rome ended by granting it. If the system had been generous in the way the compliment implies, the allies who had fought Hannibal, Philip and Antiochus alongside Roman legions for two centuries would not have needed to kill 100,000 people to be enrolled. The right formulation is that the settlement was generous by the standards of ancient imperialism, in that it offered a route in at all, and that it was designed for Roman advantage, and that it stopped expanding once Rome had all the manpower it required.
Now you. Consider two policies towards a defeated city: enslave the population and take the land, or leave it self-governing and require troops. On what does the choice depend, and which did Rome use?
Answer
It depends on what the victor is short of. A state short of land and labour takes land and labour, which Rome also did: Veii was destroyed in 396 BC, and confiscated territory funded every colony mentioned above. A state short of soldiers takes soldiers, and Rome, fighting almost every year on several fronts, was chronically short of soldiers. Rome used both, and the pattern is coherent: destruction for the nearby city whose land it wanted, incorporation for the distant or powerful one whose manpower it needed. The mixture is what makes it a policy rather than a principle.
Where this leaves the Republic
By 264 BC Rome controlled Italy south of the Po with an army it could rebuild after any single defeat, a road network to move it, and a class of ambitious men who needed wars to fight. It had no fleet, no overseas possessions and no institutions for governing anything outside Italy.
Directly across the strait from the toe of Italy lay Sicily, half of it under the influence of Carthage, the greatest naval power in the western Mediterranean and a state organised on the opposite principle: money, mercenaries and ships. The collision, and what it did to both of them, is the next lesson.