The History of the Decline and Fall of the Roman Empire - Edward Gibbon [549]
But in the acquisition of this important science, Julian was assisted by the active vigor of his own genius, as well as by the wisdom and experience of Sallust, and officer of rank, who soon conceived a sincere attachment for a prince so worthy of his friendship; and whose incorruptible integrity was adorned by the talent of insinuating the harshest truths without wounding the delicacy of a royal ear. ^69
[Footnote 67: The private life of Julian in Gaul, and the severe discipline which he embraced, are displayed by Ammianus, (xvi. 5,) who professes to praise, and by Julian himself, who affects to ridicule, (Misopogon, p. 340,) a conduct, which, in a prince of the house of Constantine, might justly excite the surprise of mankind.]
[Footnote 68: Aderat Latine quoque disserenti sufficiens sermo. Ammianus xvi. 5. But Julian, educated in the schools of Greece, always considered the language of the Romans as a foreign and popular dialect which he might use on necessary occasions.]
[Footnote 69: We are ignorant of the actual office of this excellent minister, whom Julian afterwards created praefect of Gaul. Sallust was speedly recalled by the jealousy of the emperor; and we may still read a sensible but pedantic discourse, (p. 240-252,) in which Julian deplores the loss of so valuable a friend, to whom he acknowledges himself indebted for his reputation. See La Bleterie, Preface a la Vie de lovien, p. 20.]
Immediately after Julian had received the purple at Milan, he was sent into Gaul with a feeble retinue of three hundred and sixty soldiers. At Vienna, where he passed a painful and anxious winter in the hands of those ministers to whom Constantius had intrusted the direction of his conduct, the Caesar was informed of the siege and deliverance of Autun. That large and ancient city, protected only by a ruined wall and pusillanimous garrison, was saved by the generous resolution of a few veterans, who resumed their arms for the defence of their country. In his march from Autun, through the heart of the Gallic provinces, Julian embraced with ardor the earliest opportunity of signalizing his courage. At the head of a small body of archers and heavy cavalry, he preferred the shorter but the more dangerous of two roads; ^* and sometimes eluding, and sometimes resisting, the attacks of the Barbarians, who were masters of the field, he arrived with honor and safety at the camp near Rheims, where the Roman troops had been ordered to assemble. The aspect of their young prince revived the drooping spirits of the soldiers, and they marched from Rheims in search of the enemy, with a confidence which had almost proved fatal to them. The Alemanni, familiarized to the knowledge of the country, secretly collected their scattered forces, and seizing the opportunity of a dark and rainy day, poured with unexpected fury on the rear-guard of the Romans. Before the inevitable disorder could be remedied, two legions were destroyed; and Julian was taught by experience that caution and vigilance are the most important lessons of the art of war. In a second and more successful action, ^* he recovered and established his military fame; but as the agility of the Barbarians saved them from the pursuit, his victory was neither bloody nor decisive. He advanced, however, to the banks of the