The dark shafts of the javelins arced through the snowflakes before striking the figures swarming towards the Roman line. Marcus saw scores of men collapse as the sharp iron heads tore through them. But the attackers did not waver and charged straight into the cohort’s shield wall. Sitting in his saddle, Marcus’s ears filled with the crash of shields and scrape and ringing of clashing blades, and the grunts of men locked in battle. This was unlike any fight he had ever seen. Worse even than the riots he’d witnessed from the street gangs at the Forum in Rome. And more frightening than the gladiator bouts he had been forced to endure. Those had involved a test of skill, each fighter with only one opponent to concentrate on as they duelled to the death. What was happening now seemed a bloody chaos of hacking, slashing and stabbing along the ragged battle-line.

At his side Tribune Quintus held his sword up and out as he shouted encouragement to the men under his command. ‘Hold fast! Drive the slave scum back!’

Then, just in front of the two horses, a rebel burst through the Roman line. An axe in one hand and a buckler in the other, his mouth gaped in a roar behind a wild black beard. He saw the Roman officer and charged forward, swinging the axe above his head and thrusting the heavy blade towards Quintus’s shoulder. Marcus acted instinctively, pulling hard on his reins so his horse crashed into the rebel and knocked him aside. The axe swept down, narrowly missing the tribune’s boot before crunching into the compacted snow on the ground. Quintus twisted in his saddle and swept his sword down, stabbing deep between the rebel’s shoulder blades. The man let out an agonized cry and collapsed face first in the snow as blood spattered the snow around him.

Quintus met Marcus’s eyes and he nodded his thanks before turning back to the fight.

Already the rebels’ superiority in numbers was telling. Both ends of the Roman line were being forced back as the legionaries tried to avoid being outflanked. But Marcus realized they could not prevent the inevitable for much longer. A harsh cry to his side alerted him to a fresh danger and he snapped his head round to see a lithe figure in a gladiator’s cuirass rushing towards him with a spear in both hands, the point aimed directly at Marcus’s chest. There was little time to react and he threw his weight back in the saddle at the same time as he thrust his sword out, catching the wooden shaft just beyond the iron point. He was not strong enough to parry the thrust and only deflected the point into the neck of his horse. It punched through the hide and flesh before the bloodied iron burst out the other side. The horse let out a terrified whinny and reared up, wrenching the shaft from the rebel’s hands. Marcus held the reins in his left hand as tightly as he could, but he was already leaning backwards and felt his legs slipping out of the saddle.

With a cry he tumbled off, letting the reins go before he crashed to the ground, the impact driving the breath from his lungs. There was no time to recover as the horse reared and kicked, spraying snow into Marcus’s face. He rolled away towards the river, then scrambled to his feet, gasping. On either side the legionaries were being driven back through the line of wagons and panicking mules.

‘Protect the standard!’ Quintus shouted. He turned his horse towards the gilded wreath and red drop that rose above the crumbling centre of the Roman line. Then his horse stumbled and Quintus desperately swung a leg over the saddle, jumping to the ground as the horse fell on its side, a broken leg thrashing out.

Marcus ran to his side. ‘Are you all right, sir?’

Quintus nodded. ‘We have to save the standard. Stay with me.’

They joined the small group of legionaries formed up round the standard and saw that the senior centurion was among them, fighting the rebels back and shouting to his men in between the blows he struck.

‘Form on the standard! On me!’

Those who could obeyed the order and closed ranks with their comrades. In the centre Quintus took stock of the fight.

‘We’re losing.’

Marcus caught glimpses of the fighting beyond the ring of men around him and saw that the centre of the line had broken. Some legionaries had thrown aside their weapons and were running away, pursued by the rebels, who showed no mercy. On either flank the centuries had closed up into desperate knots as they fought back to back until they were cut down. The men protecting the standard were slowly forced to give ground as they were driven away from the track towards the edge of the small lake.

The centurion forced his way to Quintus’s side. ‘Sir, we cannot let the standard fall into the enemy’s hands.’

Quintus stared back, white-faced, and Marcus saw that his lips were trembling.

The veteran officer took a breath and spoke as calmly as he could. ‘We’ve lost the fight, sir. But we can save our honour. We must not let the standard be taken. If we reach the lake, we can throw it into the depths.’

Quintus blinked and nodded. ‘Yes. That’s what we must do.’ The veteran turned and called to the men surrounding him. ‘We will give ground towards the lake. I’ll call the pace. One!.. Two!..’

The small group backed away from the rebels. All the time Marcus could hear the pounding of weapons on their shields and see the men thrusting back with the short sword of the legions. Every so often an enemy weapon found its way between the shields and a legionary let out a cry as he was wounded. Some fought on, even as their blood flowed on to the disturbed snow at their feet. Others staggered back and collapsed, too wounded to stay in formation, and Marcus saw the look in their eyes as they drew their shields close to their bodies and gripped their swords. He admired their determination to go down fighting while their comrades were forced to leave them behind as they fought to reach the lake.

Marcus glanced round and saw there were no more than thirty or so men left to protect the standard. Suddenly there was a shout from nearby.

‘Let us through! Let us through!’

He recognized the voice well enough. A moment later Decimus and a handful of his men, breathing hard and holding bloodied swords, stumbled between the shields and stood panting beside Quintus, Marcus and the standard bearer. Behind them the soldiers quickly closed ranks as the rebels continued to harry them. It was impossible to break through the wall of shields and the vicious points of the legionaries’ swords, and most of the rebels moved on, looking for easier prey.

‘We’re almost at the edge of the lake,’ the centurion announced as he craned his neck to peer over the helmets of his comrades. ‘We’ll hold our ground there for as long as possible while I get rid of the standard.’

Decimus rounded on the officer. ‘And then what? Where do we go?’

‘Go?’ The centurion smiled grimly. ‘Straight to Hades, that’s where.’

‘That’s your plan?’ Decimus laughed. ‘Not me. I’m getting out of here. I’ll swim for it.’

‘In that water? You’d freeze before you reached the far side. You can drown like a rat or die like a man with a sword in your hand.’

Decimus shook his head as he looked round the small formation. ‘You’re mad.’

Then he saw Marcus for the first time and stared at him with a puzzled expression before his eyes widened. ‘I know you! You … You’re that brat son of Titus.’

For an instant Marcus forgot the battle raging around him. He forgot the imminence of his own death at the hands of the rebels. All he saw was the face of the man who had tormented him and his mother as they stood in a slave pen waiting to be auctioned off. With a feral snarl, he raised his sword and thrust it wildly at Decimus.

‘Watch it, lad!’ the centurion snapped as he thrust his shield between Marcus and Decimus. The blade cracked harmlessly against the edge of the armour. ‘He’s one of ours, you fool!’ he snapped. ‘Watch what you do with that blade!’