Dozens of times, however, I urged him to caution. 'Julian,' I would say on a typical occasion, while reviewing correspondence from the garrisons with him, or studying our respective texts at night, 'with the military you would do well to be discreet. Every company you add to your legions is fodder for the Emperor's spies to report. He already suspects your intent. You are eliminating your options, making it all the more difficult to turn back.'
Normally he would nod in silence or simply ignore me. On the final occasion that I made such a warning, however, he slammed down the codex of laws he was reading and stood.
'Damn it, Caesarius, you underestimate me, just as General Marcellus and Sallustius and the others do!' His voice was controlled but tinged with anger. 'You and I — we have fought together, grieved together — you buried my own son! Do you know me so little? Have all my efforts to preserve Gaul, to glorify Rome, passed over your head? You still assume I nurture the option of turning back. You are wrong. There is only one direction, forward to the end, and only God knows whether I will be Emperor or a dead man. But I will not rule jointly with Constantius. I cannot apply philosophy to a man who has none. There can be no more cohabitation with the man who killed my son.'
'But, Julian,' I protested, 'the letters you have written him… the embassies you have sent. Surely something-'
'Surely nothing,' he interrupted hoarsely, in a voice barely contained. 'Don't mistake my delays for hesitation. I am building my strength, Caesarius. Time favors me, and I will not be rushed on this enterprise.'
At this I was silent, merely staring at him as I pondered the implications. He breathed slowly and deeply for a few moments, his eyes locked on mine the whole time, and again I noticed their strange light, the fanatical gleam that had so disturbed me the first time I saw it, at Strasbourg, when he was contemplating the execution of the Beast. Finally looking away, he gathered his composure, lowered himself slowly back to his seat, and bent his head to the codex he had been reading before I had spoken. I sat thunderstruck at the transformation I had witnessed, from calm strategist a few moments before, to a man consumed by a furious hatred, and back again to studious analyst. I rose to leave, but before I made my way to the door, he had one more point.
'Caesarius.' His voice was soft but penetrating, his gaze piercing.
I turned warily. He was my friend, but, yes, I feared. 'Julian?'
'When you underestimate me, you underestimate Rome itself.'
The following summer, Julian was told by his scouts that Illyricum, the province above Italy and just to the east of Gaul, had been practically depleted of legions by the call-ups to the East, and that there remained only small garrisons to defend the major cities and military facilities. With his negotiations with Constantius at a dead end, and with the Emperor's forces on the verge of routing King Sapor in Persia, Julian felt that now was the time to act, before his rival was again able to return his full attention to the problem of Gaul. He made his move.
He resolved boldly, and his advisers said foolishly, to take all of Illyricum in a single pass, which would then give him a powerful springboard to control Italy to the south and even take Constantinople itself while the rival Emperor was still absent. Like a stage magician, his task was to pull vast amounts of material out of a seemingly empty sleeve, and I do not exaggerate when I claim his sleeves were empty: after subtracting the troops needed to be left behind to garrison the border towns along the Rhine against the Alemanni, his total forces amounted to scarcely over twenty-three thousand men — a laughable army compared with the resources at Constantius' command, and frightening to consider that with it he intended to conquer all the territories from Gaul to Constantinople and then swipe the most powerful city on earth from under the Emperor's nose.
In an attempt to give the illusion of a wide-ranging, sweeping attack across Europe by a crushing force, he divided his troops into three commands. Two each were of ten thousand men under his generals Nevitta and Jovinus. The third, a mere three thousand troops, the cream of his cavalry, the swiftest horse the Gallic forces could muster, he kept for himself. The three armies he assigned to three principal routes: Nevitta was to cross through Raetia and Noricum and descend along the course of the Danube into Pannonia. Jovinus' troops were to storm across northern Italy and then up to meet with Nevitta at the Danube. Julian himself would strike out across still barely charted territory, on the longest and most difficult trek of the three, through the heart of the Black Forest, which concealed the source of the Danube and in its northern reaches still harbored Germanic tribes hostile to Roman rule.
Of the three routes into which the army was split, not only was Julian's the most challenging, it was also the most frightening, for the Black Forest was a region into which Roman armies rarely ventured. It is said that there is no one who has even reached to the extremity of that forest, though men have journeyed through for weeks, to the point of madness, and in fact it is uncertain where the forest even begins. By so dispersing his forces, Julian was emulating a strategy employed to great effect by Alexander the Great, giving the impression of vast numbers of troops and spreading terror everywhere. The three armies were to meet at Sirmium, the capital of Lower Pannonia, a rustic, provincial city on a small tributary of the Danube.
It was determined, with much discussion and considerable regret on my part, that I would not accompany him in his attack through the Black Forest. There would be no occasion for medical treatment on his lightning thrust through Germany, he said — if wounded, he would either ignore the injury or die of it. Rather, it was decided that because of my own administrative and strategic skills, I would be attached to Nevitta's unit as a senior adviser. My role was to maintain the courier contacts and communications with the home base in Gaul, and coordinate the three armies' joint arrival in Sirmium, which we had scheduled for the ides of October.
Before departing, I took the time to visit fat Oribasius, whom I had not seen for several weeks. Though we were as unalike in as many ways as two men can be — of different generations, different schools of professional practice, different religions — still, I had always found his company enjoyable and his conversation stimulating, and I wished to bid him farewell. With the exception of the days leading up to the acclamation, when Julian had summoned Oribasius for a series of private consultations, I had almost completely supplanted my colleague in his physician's services to the Caesar. This was ostensibly because I was more fit to travel on the forced marches, though Julian had often told me privately that he also mistrusted Oribasius' skills because of his antiquated theories, and that he kept him in his court merely for the sake of old friendship. Still, Oribasius seemed not to mind the diminishment of his duties in the least, and always had a friendly word for me.
Knocking on the door of the field hut he maintained as a small camp clinic for treating the garrison once or twice a week, I poked my head in.
'Oribasius? I understand you're remaining in Paris. I came to wish you well. I leave today.'
He stood up, red-faced and startled, from the table at which he was sitting, which was stacked high with dozens of sheets of identical large-lettered texts. These he was systematically folding one by one and laying in the roaring fire he had built in the small fireplace. The room was heated to a stifling temperature. He limped over to me, his pink, fat face perspiring, but wreathed in smiles.