Though Augustus was on good terms with Tiberius, the children of Julia were not; they were more Julian than the head of the Julian race; they noted everything that could be interpreted to his discredit; they recorded every hasty word, every ill-advised speech, and as the years went on their malignity increased, till in the person of Agrippina it amounted to a monomania. But we must pause to study Tiberius as a general. IX The Campaigns of Tiberius With the battle of Actium the wars of Rome against nations equally civilized with herself came to an end; henceforth the rulers of the world were only called upon to round off the ring fence of their domains, and establish scientific frontiers. The Empire which is so often spoken of as the establishment of a military despotism was, in fact, absolutely the reverse; the power wielded by Marius, by Sulla, by Pompeius, by Cæsar, by Antonius, had this character, for it depended upon the military capacity of these generals; they were soldiers in the first place, and owed their predominance in the civil government to their own sharp swords and the fidelity of the men who had followed their standards. Till the Roman was sole umpire in the circle of the Mediterranean, war was in every respect a profitable investment, and a military career was the readiest path to political supremacy; not only did a Roman general return laden with spoil, rich beyond the dreams of avarice, but his conquests appealed to the imagination of his countrymen; everybody might be proud of generals and armies who had beaten the successors of Alexander; but when military operations were transferred to the frontiers, when the enemies to be subdued were poor and half civilized, when there were no longer gorgeous robes, graceful statues, piles of treasure to be exhibited in the triumphal procession of the victorious general, war lost its prestige; and the steady progress of the civilian administration is, in fact, the special feature of the reigns of the Cæsars. Augustus was no soldier; Tiberius never commanded an army after his succession; the expedition of Caligula to the shore of the English Channel was a madman’s freak; Claudius had but little share in the conquest of Britain; Nero’s morbid vanity preferred the triumphs of the stage to those of the camp. A state in which the military element is predominant does not put up with rulers such as these.