A great revolution, about this time, changed the condition of Asia. The new Persian monarchy, under Artaxerxes, the grandson of Sassan, had overthrown the Parthian empire, and now aimed at the recovery of all the dominions of Darius Hystaspes. Artaxerxes actually sent an embassy to Alexander Severus, demanding the restitution to Persia of her ancient provinces between the Ægean and the Euphrates. The reply was a declaration of war. Alexander in person met the forces of Artaxerxes in the plain east of the Euphrates, and defeated them in a great battle, A. D. 232.

Hearing that the Germans were plundering Gaul, he hastened to make peace and returned to Rome. The next year he set out for Germany; but before he could begin his military operations there, he was murdered by a small band of mutinous soldiers. The virtues of Alexander were largely owing to the watchful care of his mother, in guarding his childhood from the wickedness with which he was surrounded. The prince repaid her vigilance by the most dutiful and tender regard; and it is said that her over-cautious and economical policy, which led him to withhold gifts of money demanded by the army, occasioned his death.

213. The ringleader of the mutiny was Max´imin, a Thracian peasant—a brutal and illiterate ruffian, yet with enough natural ability to cause him to be chosen emperor by his comrades. Three years this savage ruled the world, his only policy being hatred toward the noble and covetousness toward the rich; until the people of Africa, roused to fury by the extortions of his agents, revolted and crowned their proconsul, Gor´dian, and his son. The two Gordians were slain within a month; but the Senate supplied their place by two of its own number, and with unwonted spirit prepared for the defense of Italy. Maximin marched from his winter-quarters on the Danube, but he had advanced no farther than Aquileia when he was murdered in his tent by his own soldiers.

214. Though the legions had destroyed the emperor of their choice, they had no intention of yielding to that of the Senate. They murdered Pupie´nus and Balbi´nus within six weeks of their triumph over Maximin, and bestowed the imperial robes upon a younger Gordian, the grandson of the former proconsul of Africa. This boy of twelve years was intended, of course, to be a mere tool of his ministers. Timesith´eus, the prætorian præfect, was an able officer, and, so long as he lived, vigorously upheld the imperial power against Persian assaults and African insurrections. He was succeeded in command by Philip the Arabian, who artfully procured the death of the young emperor, and assumed the purple himself. He wrote to the Senate that Gordian had died of disease, and requested that divine honors should be paid to his memory.

215. Among the few events recorded of the five years (A. D. 244-249) of Philip’s reign, is the celebration of the “Secular Games” at Rome, upon the completion of a thousand years from the building of the city, April 21, A. D. 248. Rival emperors were set up by the Syrians, and by the army in Mœsia and Pannonia. Decius, a senator, was sent by Philip to appease the latter. Their mock-emperor was already dead, but the soldiers, believing their guilt too great to be forgiven by Philip, thronged around Decius with tumultuous cries of “Death or the purple!” The loyal officer, with a hundred swords at his throat, was compelled to be crowned, and to consent to lead his rebellious army into Italy. He wrote to assure his master that he was only acting a part, and would resign his mock-sovereignty as soon as he could escape his troublesome subjects. But Philip did not believe these professions of loyalty. He marched to meet the insurgents at Verona, was defeated and slain, Sept., A. D. 249.

216. The two years’ reign of Decius (A. D. 249-251) was marked by two widely different attempts to restore the ancient religion and morality of Rome—the revival of the censorship and the persecution of the Christians. It was deeply felt that the calamities of the empire were due to the corruption of its people. But the first measure produced no effect, while the second only aroused the evil passions of men, and occasioned untold misery. The bishops of Antioch, Jerusalem, and Rome became martyrs, and Alexandria was the scene of a frightful massacre. Another calamity, for which Decius was not responsible, was the first great incursion of the Goths, who ravaged the provinces of Mœsia and Thrace south of the Danube. Decius was defeated by them in A. D. 250; and the next year, in attempting to cut off their retreat, he lost his life in a great battle.

217. Gallus, an able general, was crowned by the Senate, Hostilia´nus, the son of Decius, being associated with him in the imperial dignity. Calamities thickened; pestilence raged in Rome, and fresh swarms of barbarians, only encouraged by the successes of the Goths, and the sums of money which had been paid them as the price of peace, ravaged the Danubian provinces. Hostilianus died of the plague, and the distress of the people led them to unjust accusations of the emperor. Æmilianus having defeated an army of the invaders, was proclaimed as sovereign by his troops, and, marching into Italy, defeated Gallus and his son at Interam´na. Æmilian was acknowledged by the Senate, but his reign was short. Valerian, a noble and virtuous officer, had been sent by Gallus to bring the Gallic and German legions to his aid. He arrived too late to save his master, but he defeated Æmilian near the scene of his former victory, and himself received the allegiance of Senate and people.

It was no enviable distinction, for the causes that were tending to the destruction of the empire were more numerous and fiercely active than ever. The Franks from the lower Rhine, the Aleman´ni from southern Germany, ravaged Italy, Gaul, and Spain, and even crossed the straits into Africa. The Goths had made themselves fleets from the forests of the Euxine, with which they devastated the coasts of Asia Minor and Greece, capturing and burning innumerable cities, among which were Cyzicus, Chalcedon, Ephesus, and even Corinth and Athens. The new Persian kingdom of the Sassanidæ had increased in power. Its second monarch, Sapor, conquered Armenia, and overran the Roman provinces in the East. He defeated and captured Valerian in a battle near the Euphrates, and gratified his pride by a spectacle which no monarch before had ever been able to exhibit—a Roman emperor, loaded with chains but clothed in purple, a perpetual captive at his court.

The government being thus overwhelmed with calamities, various pretenders claimed the sovereignty of the several fragments of the empire. These adventurers were known in general as the “Thirty Tyrants.” Their reigns were usually too short or too insignificant to be worthy of mention. Palmyra continued to be the royal seat of Odena´tus, and after his death, of his widow, Zenob´ia, for ten years, A. D. 264-273, inclusive. Pos´thumus established a kingdom in Gaul, which lasted seventeen years. Valerian, before his disasters in the East, had associated with him, in the cares of empire, his son Gallie´nus; but that prince could attempt little more than the defense of Italy. Aure´olus, commanding on the upper Danube, assumed the imperial title and crossed the Alps. He was defeated by Gallienus, and besieged in Milan. Through his arts, Gallienus was slain by his own soldiers; but they conferred the purple on a more honest man and better general, whom the murdered prince had named in his dying moments. Milan was taken and Aureolus put to death.