Rome, towards the end of the fifth century, thus ruled, though in different degrees, the peoples of Italy proper. The Italian State, if we may give it that name, was composed of a reigning class, the citizens; of a class protected, or held in guardianship, the allies; and of a third class, the subjects. Allies or subjects were all obliged to furnish military contingents. The maritime Greek towns furnished sailors to the fleet. Even the cities, which preserved their independence for their interior affairs, obeyed, so far as the military administration was concerned, special functionaries appointed by the metropolis.[220] The consuls had the right of raising in the countries bordering on the theatre of war all men capable of bearing arms. The equipment and pay of the troops remained at the charge of the cities; Rome provided for their maintenance during war. The auxiliary infantry was ordinarily equal in number to that of the Romans, the cavalry double or triple. In exchange for this military assistance, the allies had a right to a part of the conquered territory, and, in return for an annual rent, to the usufruct of the domains of the State. These domains, considerable in the peninsula,[221] formed the sole source of income which the treasury derived from the allies, free in other respects from tribute. Four questors (_quæstores classici_) were established to watch over the execution of the orders of the Senate, the equipment of the fleet, and the collection of the farm-rents. Rome reserved to herself exclusively the direction of the affairs of the exterior, and presided alone over the destinies of the Republic. The allies never interfered in the decisions of the Forum, and each town kept within the narrow limits of its communal administration. The Italian nationality was thus gradually constituted by means of this political centralisation, without which the different peoples would have mutually weakened each other by intestine wars, more ruinous than foreign wars, and Italy would not have been in a condition to resist the double pressure of the Gauls and the Carthaginians. The form adopted by Rome to rule Italy was the best possible, but only as a transition form. The object to be aimed at was, in fact, the complete assimilation of all the inhabitants of the peninsula, and this was evidently the aim of the wise policy of the Camilli and the Fabii. When we consider that the colonies of citizens presented the faithful image of Rome; that the Latin colonies had analogous institutions and laws; and that a great number of Roman citizens and Latin allies were dispersed, in the different countries of the peninsula, over the vast territories ceded as the consequence of war, we may judge how rapid must have been the diffusion of Roman manners and the Latin language.