his forty-sixth year.  When, in consequence of the occupation of Spain, the service began to become permanent,(13) it seems to have been first legally enacted that any one who had been in the field for six successive years acquired thereby a right to discharge, although this discharge did not protect him from being called out again afterwards.  At a later period, perhaps about the beginning of this century, the rule arose, that a service of twenty years in the infantry or ten years in the cavalry gave exemption from further military service.(14) Gracchus renewed the rule—­which presumably was often violently infringed—­that no burgess should be enlisted in the army before the commencement of his eighteenth year; and also, apparently, restricted the number of campaigns requisite for full exemption from military duty.  Besides, the clothing of the soldiers, the value of which had hitherto been deducted from their pay, was henceforward furnished gratuitously by the state.

To this head belongs, moreover, the tendency which is on various occasions apparent in the Gracchan legislation, if not to abolish capital punishment, at any rate to restrict it still further than had been done before—­a tendency, which to some extent made itself felt even in military jurisdiction.  From the very introduction of the republic the magistrate had lost the right of inflicting capital punishment on the burgess without consulting the community, except under martial law;(15) if this right of appeal by the burgess appears soon after the period of the Gracchi available even in the camp, and the right of the general to inflict capital punishments appears restricted to allies and subjects, the source of the change is probably to be sought in the law of Gaius Gracchus -de provocatione- But the right of the community to inflict or rather to confirm sentence of death was indirectly yet essentially limited by the fact, that Gracchus withdrew the cognizance of those public crimes which most frequently gave occasion to capital sentences—­poisoning and murder generally—­ from the burgesses, and entrusted it to permanent judicial commissions.  These could not, like the tribunals of the people, be broken up by the intercession of a tribune, and there not only lay no appeal from them to the community, but their sentences were as little subject to be annulled by the community as those of the long-established civil jurymen.  In the burgess-tribunals it had, especially in strictly political processes, no doubt long been the rule that the accused remained at liberty during his trial, and was allowed by surrendering his burgess-rights to save at least life and freedom; for the fine laid on property, as well as the civil condemnation, might still affect even the exiled.  But preliminary arrest and complete execution of the sentence remained in such cases at least legally possible, and were still sometimes carried into effect even against persons of rank; for instance, Lucius Hostilius Tubulus, praetor