Suddenly, we heard a commotion far behind us, the faint blare of trumpets and the high-pitched, womanlike screams of wounded horses. Julian, riding beside Sallustius and several other advisers just ahead of me in the vanguard, galloped out of the line of march and wheeled his horse, peering to the rear through the haze.
Shouts passed up along the line by heralds brought the news to our ears within seconds.
'Persian attack on the rear! Cavalry and light-armed infantry!'
Julian had expected more warning from the normally heavy-handed Persians. Contrary to his own orders, he had earlier removed his armor against the heat, and he paused now only to pull down his helmet, which hung from his shoulders, and to seize a shield from a cavalry officer standing nearby. He set heels to flanks and sprinted back along the line of march in the direction of the tumult, shouting as he did so for the rest of the army to continue its march forward but to remain alert.
I broke rank and raced along with his guards and generals, weaving half blinded through the thick dust they raised, and within moments we approached the rear. Judging from the terrifying clamor and roiling cloud of dust ahead of us, full-scale battle had already been joined. We were surrounded by surging masses of grim-faced men, their skin black and shiny as they raced to the rear in confusion to assist their comrades. Julian craned his neck, peering through the dust in search of an officer who could tell him what was happening, when we were suddenly startled by another trumpet blast, this time from behind us, toward the column's front.
'What in Hades…?' Julian muttered, as Sallustius wheeled and galloped back toward where we had just ridden. He was met by the officer who had lent his shield. Sallustius conferred with him briefly, then raced his mount back to Julian, who was still struggling to force his way through the throng of men to the rear.
'My lord!' Sallustius called out. 'Sapor is attacking the front as well!'
Julian stopped short and wheeled his own horse, his grimy face twisted in rage.
'By the gods!' he shouted. 'Sallustius, you lead, return to the front! We are still under a truce with the Persians — Sapor will pay for his treachery!'
Leaping forward, he raced back up the track, against the tide of running men who at Sallustius' frantic shouts hastened to step aside to avoid the sharp hooves of the Emperor's horse.
We cleared the rear guard, crossing the gap that had opened between the army's two ends and joining the weary units of troops trotting resignedly to the front. Just then, we were startled by yet more trumpeting, this time maddened and frantic, from what sounded like dozens of instruments, not behind us or ahead, but directly to the side. An enormous cloud of dust surged down the high ridge from the Persian troops on our left flank. Straining to see through the dense haze I could make out the gleam of glittering armor and weapons, the helmets and spear tips seeming to advance at an impossible height relative to the ground. The horrifying trumpeting continued, pressing ever louder, and the troops beside us froze in awe and horror at the sight — a brigade of the King's armored war elephants, bearing down on us at a speed unmatched by any beast or machine on earth.
At the dreadful sound of the trumpeting elephants, the Roman horses reared, rolling their eyes in terror, and even Julian's well-trained mount almost threw him in the dust. The elephants' awful appearance, their gaping jaws and horrendous smell, struck fear in man and animal, and as the line of beasts approached, the earth physically trembled under the terrible weight of their stumplike feet. They thundered straight toward the center of our panicking column as the drivers perched precariously on the base of the beasts' necks, peering down at us with evil grins, their white teeth gleaming through the blackness of their faces.
The beasts plowed into our line, enraged at the screams of our terrified troops. The men scattered, fleeing for their lives, while the elephants reared in their midst, bellowing and trumpeting, stomping again and again on the bodies of those they had trampled until they were nothing more than dark smears in the sooty earth. Roman limbs and torsos hung limp and dripping from the tusks, emboldening the animals further in their blood rage. The archers in the towers above rained arrows down upon our men, felling them where they stood to create lines of writhing wounded whom the elephants hastened to stamp upon and crush, or to scoop up in their tusks and tear apart with their jaws. When our Gauls finally managed to scramble out of range of the flashing ivory, the elephant drivers deftly maneuvered their beasts away from the scene of slaughter and formed up in a rank to prepare for another charge at our massed and terrified troops. Behind them, marching implacably down the ridge in tight formation, came an enormous body of Persian infantry, raising their ululating battle cry, preparing to rush in and finish off the destruction begun by the elephants as soon as the terrible beasts had completed their work.
As the elephants withdrew and began re-forming, Julian plunged into the thick of his troops, his energy restored, eyes glinting with an almost terrifying intensity behind the visor of his battle helmet. The man was everywhere, wheeling and careening his horse like one possessed, shouting encouragement, arranging his troops into a tight battle formation, bellowing instructions for defeating the monsters when they next attacked. The Gauls stared, but swallowed their fear and their impulse to flee into the desert, obeying him with the military precision he had instilled in them over years of campaigning. Shields were raised, bronze-tipped pikes lowered into position, and as the thick black dust settled on our heads we turned to face the elephants' renewed onslaught.
It came immediately. Led by the huge bull, its red mouth gaping and lips flapping, the beasts charged again into our column, twenty or more of them, shoulder to shoulder in ranks of four. One carried a Roman soldier, impaled through the belly on the beast's chest spike during the previous charge, the man's legs and head flailing helplessly with the animal's swaying strides, his lifeless eyes staring forward at his comrades like a bloodied figurehead on the prow of a ship. Onward they charged, trumpeting, the ground trembling, and as they approached the men fell silent and tensed.
'Stay your weapons!' shouted Julian, his lips twisted into a kind of mad grin or a grimace, eyeing the onrushing brutes, blinders forcing their stare straight into the thick of the Roman legion. 'Stay!' he repeated, his voice rising, and the terrible, rancid stench of the animals filled our nostrils, mixing with the reek of the blood and excrement covering our feet and the ground around us, 'Stay!.. Until I say…
'NOW!'
As the elephants thundered furiously into our midst, the ranks of men suddenly parted in the middle like a split sheet of parchment, the two halves of the cohorts leaping frantically to the sides, leaving nothing but empty ground in the middle as the enraged elephants raced through the passage left between the men and skidded to a confused stop.
Instantly our troops let out a roar, drowning out the trumpeting of the angry beasts, which wrenched their heads in bewilderment from side to side as they sought to peer around their blinders and make out the source of the sound.