Knowing the sloth of the Emperor Julian, he persuaded the army in Sclavonia, of which he was captain, that it would be right to go to Rome and avenge the death of Pertinax, who had been killed by the praetorian soldiers; and under this pretext, without appearing to aspire to the throne, he moved the army on Rome, and reached Italy before it was known that he had started.  On his arrival at Rome, the Senate, through fear, elected him emperor and killed Julian.  After this there remained for Severus, who wished to make himself master of the whole empire, two difficulties; one in Asia, where Niger, head of the Asiatic army, had caused himself to be proclaimed emperor; the other in the west where Albinus was, who also aspired to the throne.  And as he considered it dangerous to declare himself hostile to both, he decided to attack Niger and to deceive Albinus.  To the latter he wrote that, being elected emperor by the Senate, he was willing to share that dignity with him and sent him the title of Caesar; and, moreover, that the Senate had made Albinus his colleague; which things were accepted by Albinus as true.  But after Severus had conquered and killed Niger, and settled oriental affairs, he returned to Rome and complained to the Senate that Albinus, little recognizing the benefits that he had received from him, had by treachery sought to murder him, and for this ingratitude he was compelled to punish him.  Afterwards he sought him out in France, and took from him his government and life.  He who will, therefore, carefully examine the actions of this man will find him a most valiant lion and a most cunning fox; he will find him feared and respected by every one, and not hated by the army; and it need not be wondered at that he, a new man, was able to hold the empire so well, because his supreme renown always protected him from that hatred which the people might have conceived against him for his violence.

But his son Antoninus was a most eminent man, and had very excellent qualities, which made him admirable in the sight of the people and acceptable to the soldiers, for he was a warlike man, most enduring of fatigue, a despiser of all delicate food and other luxuries, which caused him to be beloved by the armies.  Nevertheless, his ferocity and cruelties were so great and so unheard of that, after endless single murders, he killed a large number of the people of Rome and all those of Alexandria.  He became hated by the whole world, and also feared by those he had around him, to such an extent that he was murdered in the midst of his army by a centurion.  And here it must be noted that such-like deaths, which are deliberately inflicted with a resolved and desperate courage, cannot be avoided by princes, because any one who does not fear to die can inflict them; but a prince may fear them the less because they are very rare; he has only to be careful not to do any grave injury to those whom he employs or has around him in the service of the state.  Antoninus had not taken this care, but had contumeliously killed a brother of that centurion, whom also he daily threatened, yet retained in his bodyguard; which, as it turned out, was a rash thing to do, and proved the emperor’s ruin.