While the martial nations of Europe followed the standards of his brothers, Constantius, at the head of the effeminate troops of Asia, was left to sustain the weight of the Persian War. At the decease of Constantine, the throne of the East was filled by Sapor, son of Hormuz or Hormisdas, and grandson of Narses, who, after the victory of Galerius, had humbly confessed the superiority of the Roman power. Although Sapor was in the thirtieth year of his long reign, he was still in the vigour of youth, as the date of his accession, by a very strange fatality, had preceded that of his birth. The wife of Hormuz remained pregnant at the time of her husband’s death; and the uncertainty of the sex, as well as of the event, excited the ambitious hopes of the princes of the house of Sassan. The apprehensions of civil war were at length removed by the positive assurance of the magi that the widow of Hormuz had conceived and would safely produce a son. Obedient to the voice of superstition, the Persians prepared, without delay, the ceremony of his coronation. A royal bed, on which the queen lay in state, was exhibited in the midst of the palace; the diadem was placed on the spot which might be supposed to conceal the future heir of Artaxerxes, and the prostrate satraps adored the majesty of their invisible and insensible sovereign.
If any credit can be given to this marvellous tale, which seems however to be countenanced by the manners of the people and by the extraordinary duration of his reign, we must admire not only the fortune but the genius of Sapor. In the soft sequestrated education of a Persian harem, the royal youth could discover the importance of exercising the vigour of his mind and body; and by his personal merit deserved a throne, on which he had been seated while he was yet unconscious of the duties and temptations of absolute power. His minority was exposed to the almost inevitable calamities of domestic discord; his capital was surprised and plundered by Thair, a powerful king of Yemen, or Arabia; and the majesty of the royal family was degraded by the captivity of a princess, the sister of the deceased king. But as soon as Sapor attained the age of manhood, the presumptuous Thair, his nation, and his country fell beneath the first effort of the young warrior, who used his victory with so judicious a mixture of rigour and clemency that he obtained from the fears and gratitude of the Arabs the title of
The ambition of the Persian, to whom his enemies ascribe the virtues of a soldier and a statesman, was animated by the desire of revenging the disgrace of his fathers and of wresting from the hands of the Romans the five provinces beyond the Tigris. The military fame of Constantine and the real or apparent strength of his government suspended the attack; and while the hostile conduct of Sapor provoked the resentment his artful negotiations amused the patience of the imperial court. The death of Constantine was the signal of war, and the actual condition of the Syrian and Armenian frontier seemed to encourage the Persians by the prospect of a rich spoil and an easy conquest. The example of the massacres of the palace diffused a spirit of licentiousness and sedition among the troops of the East, who were no longer restrained by the habits of obedience to a veteran commander. By the prudence of Constantius, who from the interview with his brothers in Pannonia immediately hastened to the banks of the Euphrates, the legions were gradually restored to a sense of duty; but the season of anarchy had permitted Sapor to form the siege of Nisibis, and to occupy several of the most important fortresses of Mesopotamia.