The life of Misitheus had been spent in the profession of letters, not of arms; yet such was the versatile genius of that great man, that, when he was appointed Prætorian Præfect, he discharged the military duties of his place with vigor and ability. The Persians had invaded Mesopotamia, and threatened Antioch. By the persuasion of his father-in-law, the young emperor quitted the luxury of Rome, opened, for the last time recorded in history, the temple of Janus, and marched in person into the East. On his approach, with a great army, the Persians withdrew their garrisons from the cities which they had already taken, and retired from the Euphrates to the Tigris. Gordian enjoyed the pleasure of announcing to the senate the first success of his arms, which he ascribed, with a becoming modesty and gratitude, to the wisdom of his father and Præfect. During the whole expedition, Misitheus watched over the safety and discipline of the army; whilst he prevented their dangerous murmurs by maintaining a regular plenty in the camp, and by establishing ample magazines of vinegar, bacon, straw, barley, and wheat in all the cities of the frontier. But the prosperity of Gordian expired with Misitheus, who died of a flux, not without very strong suspicions of poison. Philip, his successor in the præfecture, was an Arab by birth, and consequently, in the earlier part of his life, a robber by profession. His rise from so obscure a station to the first dignities of the empire, seems to prove that he was a bold and able leader. But his boldness prompted him to aspire to the throne, and his abilities were employed to supplant, not to serve, his indulgent master. The minds of the soldiers were irritated by an artificial scarcity, created by his contrivance in the camp; and the distress of the army was attributed to the youth and incapacity of the prince. It is not in our power to trace the successive steps of the secret conspiracy and open sedition, which were at length fatal to Gordian. A sepulchral monument was erected to his memory on the spot where he was killed, near the conflux of the Euphrates with the little river Aboras. The fortunate Philip, raised to the empire by the votes of the soldiers, found a ready obedience from the senate and the provinces.