Set up in the reign of the Emperor Flavius Valerius Constantinus; five miles from Ariminum
Titus rode across Ariminum’s five-spanned bridge of white marble, past the triumphal arch erected by Augustus to mark the junction of the Via Flaminia and the Via Aemilia, and headed north-west up the latter.
Southwards, the Via Flaminia hugged the coast for twenty miles, before turning inland bound for Rome. This was Italia proper: parcelled neatly into farms and villas, studded with little towns, overshadowed by the Apennini Mountains. Northwards, bounded on the south by the Aemilian Way, stretched the vast alluvial wetlands of the Po basin, the old province of Cisalpine Gaul, which still in some ways felt unlike Italia, almost foreign.
Solving the cryptic inscription in Aetius’ codex hadn’t been difficult. ‘His Philippi’ could surely only refer to a decisive contest between Aetius and his arch-rival Boniface; that historic field had witnessed Mark Antony and Octavian smash the forces of Brutus and Cassius. ‘The fifth milestone from A’? ‘A’, while theoretically applicable to any of a thousand places, probably referred, Titus decided, to somewhere not far from Boniface’s headquarters in Ravenna. Titus reasoned that Boniface, having taken a mauling mentally as well as militarily in Africa, would instinctively want to remain close to his base, like a hurt animal. Aetius would realize that, and intend to bring the battle to his rival, in such a way as to secure an advantage for himself.
Working on this theory, ‘A’ could mean (moving north to south in an arc round the head of the Adriatic) any one of the following: Aquileia, Altinum, Ateste, Ariminum, Ancona. Titus conjectured that Ariminum,1 being nearest to Ravenna, was the most likely. He had already examined the terrain around the fifth milestone from Ariminum on both the Popilian Way — the coast road from Ariminum to Aquileia — and the Flaminian Way. On the former, he had found himself in a bleak wilderness of salt-marshes, dunes, and lagoons — a most unsuitable venue for a battlefield. On the latter these features were replaced by terraced cultivation — again, hardly ideal for the deployment of forces. ‘The fifth milestone’, on whichever road it was, must be in an area which guaranteed Aetius tactical superiority, and to which Boniface must be persuaded to bring his men. The only other road out of Ariminum was the Aemilian Way, so that must be the best option. Autumn was now well advanced. Winter rains and freezing Alpine winds meant that Aetius would not be engineering a confrontation before spring at the earliest, which gave both sides a breathing-space in which to make preparations. Though Boniface didn’t know it yet, his preparations could well be shaped by information stemming from Titus’ investigations.
Walking his horse along the soft verge of the arrow-straight Aemilian Way, Titus reached the fifth milestone in a little over an hour. A cylindrical column of limestone on a square base, it bore the inscription ‘IMP. CAES. FLAV. VAL. CONSTANTINO: AB ARIMINO M. P. V.’
He consulted his road-table, a chart showing sections of the Way in ‘ribbon’ style, and noted the salient features of the surrounding landscape. A small stream, the Uso, flowed through a culvert beneath the road. (The next crossing — of the famous Rubicon, — lay a mile or so ahead.) To the north of the road stretched a vast expanse of reedbeds. Beside the corresponding area on his chart appeared the word ‘cuniculi’: drainage channels. To the south, the terrain was unreclaimed marshland. The road was virtually a causeway over a swamp.
Depression swept over the young man. Despite its proximity to the Rubicon (whose weight of historical association might be calculated to attract Boniface), of the three possibilities this looked the least promising. In fact, from a tactical point of view, none of the sites made any sense at all — prompting the suspicion that ‘A’ must represent somewhere other than Ariminum. Rain began to fall, adding to Titus’ gloom. Within seconds it was sheeting down, soaking through the thick wool of his cloak, bouncing off the road, gushing into the side-ditches. As he turned his horse’s head for the return journey, Titus became aware of a loud gurgling: rainwater rushing through those drainage channels. Realization burst upon him. His hunch had played off: this was indeed the spot selected by Aetius for Boniface to meet his Philippi.
1 Rimini