Again, if the slave had to suffer from political disqualifications, he had corresponding immunities; for one thing, he was exempt from military service. One very important consequence of this aspect of slavery was the restriction of the field from which recruits could be drawn for armies; it would perhaps be an exaggeration to say that the whole of the industrial population of antiquity was not available for military purposes, but the statement is somewhere near the truth; and from this followed a further consequence, which eventually helped to break up the Empire, viz., that the armies were increasingly recruited from the populations on the confines of the Empire, and ceased to be Italian. First Gaul, Spain and Illyria, and Thrace, then the Teutons from Central Europe, sent free recruits to the Roman armies, till the time came when the less civilized military element threw off the traditions of the civil government, and society returned to the conditions which had prevailed before the Roman Empire inaugurated the reign of peace. Agricultural slavery in Italy is sometimes said to have been the cause of the depletion of the Roman armies; ancient authors complain that the hardy breed of peasants from the central hills of Italy disappeared, and that, because their place had been taken by slaves, the recruiting grounds were barren of the right kind of population. The real state of the case was the reverse: the Roman wars had exhausted the Roman free population, which was then replaced by slaves. Between the end of the second Punic War and Cæsar’s campaigns in Gaul, Rome had been continuously draining Italy of her free population; it was inevitable that the sons of the small farmer should be replaced by slaves, and that eventually small farms should be merged in large holdings, and that the slave barrack should stand alone where the scattered homesteads of the peasant proprietor had adorned the landscape.