he himself, advancing with equal steps along the banks of the Euphrates, should besiege the capital of the Persian monarchy. The success of this well-concerted plan depended, in a great measure, on the powerful and ready assistance of the king of Armenia, who, without exposing the safety of his own dominions, might detach an army of four thousand horse, and twenty thousand foot, to the assistance of the Romans. But the feeble Arsaces Tiranus, king of Armenia, had degenerated still more shamefully than his father Chosroes, from the manly virtues of the great Tiridates; and as the pusillanimous monarch was averse to any enterprise of danger and glory, he could disguise his timid indolence by the more decent excuses of religion and gratitude. He expressed a pious attachment to the memory of Constantius, from whose hands he had received in marriage Olympias, the daughter of the præfect Ablavius; and the alliance of a female, who had been educated as the destined wife of the emperor Constans, exalted the dignity of a Barbarian king. Tiranus professed the Christian religion; he reigned over a nation of Christians; and he was restrained, by every principle of conscience and interest, from contributing to the victory, which would consummate the ruin of the church. The alienated mind of Tiranus was exasperated by the indiscretion of Julian, who treated the king of Armenia as his slave, and as the enemy of the gods. The haughty and threatening style of the Imperial mandates awakened the secret indignation of a prince, who, in the humiliating state of dependence, was still conscious of his royal descent from the Arsacides, the lords of the East, and the rivals of the Roman power.

The military dispositions of Julian were skilfully contrived to deceive the spies and to divert the attention of Sapor. The legions appeared to direct their march towards Nisibis and the Tigris. On a sudden they wheeled to the right; traversed the level and naked plain of Carrhæ; and reached, on the third day, the banks of the Euphrates, where the strong town of Nicephorium, or Callinicum, had been founded by the Macedonian kings. From thence the emperor pursued his march, above ninety miles, along the winding stream of the Euphrates, till, at length, about one month after his departure from Antioch, he discovered the towers of Circesium, * the extreme limit of the Roman dominions. The army of Julian, the most numerous that any of the Cæsars had ever led against Persia, consisted of sixty-five thousand effective and well-disciplined soldiers. The veteran bands of cavalry and infantry, of Romans and Barbarians, had been selected from the different provinces; and a just preeminence of loyalty and valor was claimed by the hardy Gauls, who guarded the throne and person of their beloved prince. A formidable body of Scythian auxiliaries had been transported from another climate, and almost from another world, to invade a distant country, of whose name and situation they were ignorant. The love of rapine and war allured to the Imperial standard several tribes of Saracens, or roving Arabs, whose service Julian had commanded, while he sternly refuse the payment of the accustomed subsidies. The broad channel of the Euphrates was crowded by a fleet of eleven hundred ships, destined to attend the motions, and to satisfy the wants, of the Roman army. The military strength of the fleet was composed of fifty armed galleys; and these were accompanied by an equal number of flat-bottomed boats, which might occasionally be connected into the form of temporary bridges. The rest of the ships, partly constructed of timber, and partly covered with raw hides, were laden with an almost inexhaustible supply of arms and engines, of utensils and provisions. The vigilant humanity of Julian had embarked a very large magazine of vinegar and biscuit for the use of the soldiers, but he prohibited the indulgence of wine; and rigorously stopped a long string of superfluous camels that attempted to follow the rear of the army. The River Chaboras falls into the Euphrates at Circesium; and as soon as the trumpet gave the signal of march, the Romans passed the little stream which separated two mighty and hostile empires. The custom of ancient discipline required a military oration; and Julian embraced every opportunity of displaying his eloquence. He animated the impatient and attentive legions by the example of the inflexible courage and glorious triumphs of their ancestors. He excited their resentment by a lively picture of the insolence of the Persians; and he exhorted them to imitate his firm resolution, either to extirpate that perfidious nation, or to devote his life in the cause of the republic. The eloquence of Julian was enforced by a donative of one hundred and thirty pieces of silver to every soldier; and the bridge of the Chaboras was instantly cut away, to convince the troops that they must place their hopes of safety in the success of their arms. Yet the prudence of the emperor induced him to secure a remote frontier, perpetually exposed to the inroads of the hostile Arabs. A detachment of four thousand men was left at Circesium, which completed, to the number of ten thousand, the regular garrison of that important fortress.