Fierach removed his senses from the tactical plot, grunting in satisfaction as Moderati Yousen reported, 'Lieutenant Colonel Leonid reports that Force Anvil is in position and ready to move out on your order.'

Fierach acknowledged the information with a raised finger, impressed at the efficiency of Leonid. He had always liked Vauban's second-in-command more than the castellan himself, feeling that Leonid was far more a natural warrior than Vauban.

'Very good, Moderati. Open a channel to all Titans.'

Yousen's finger danced across the panel before him. He nodded towards his princeps.

'All princeps, this is Fierach. You all know what to do, so carry out your orders. I wish you joy of the day and good hunting. May the Emperor guide your aim.'

He closed the channel without waiting for a response and trained his eyes on the red expanse of plain that stretched before his Titan, noting the distant plumes of smoke that marked the locations of the enemy camp.

Fierach whispered a mantra of salute to the spirit of the Imperator Bellum and said, 'Engineer Ulandro, give me striding speed. We go to battle.'

Princeps Carlsen relished the sense of speed that coursed through his body as his Warhound Titan, the Defensor Fidei, sprinted ahead of the Legio's Battle Titans. Less than half the size of a Reaver Titan, the Warhound was an agile Scout Titan, the forward eyes and ears of the Legio. Less well armed and protected, it was no match for larger Titans, but could tear apart infantry formations with a combination of its deadly assault weaponry and speed.

His wingman, the Jure Divinu, thundered alongside him, keeping pace with his evasive manoeuvres to throw off any incoming fire that might be directed at them. There was none at the moment, but it never paid to be too complacent when your void shields could be taken out with one good volley.

Carlsen turned to Moderati Arkian and said, 'Anything?'

Arkian shook his head. 'No, not yet. But it won't be long now.'

Carlsen nodded and returned his attention to the ground before him. A spur of rock from the valley sides some five hundred metres away offered some protection should it prove necessary to take shelter from incoming fire. The enemy line was a kilometre away and he knew their speed would protect them from all but a desperately lucky shot.

Behind him, advancing abreast, came a portion of the armoured might of the 383rd Jouran Dragoons, and unlike the princeps of the larger Titans, Carlsen had a healthy respect for infantry and armoured vehicles. Friendly support was vital for a Titan of his size. Enemy infantry and vehicles could pose a serious threat to a Warhound.

'Have they even seen us yet?' he wondered aloud.

'Maybe we caught them at meal time,' offered Moderati Arkian with a grin.

'That would be handy indeed, but I think we've just disturbed them,' replied Carlsen as he spotted tongues of flame belch skyward from artillery behind the monstrous earthworks thrown up before the enemy camp.

He jinked the Defensor Fidei sideways, keeping close to the valley walls.

Lieutenant Colonel Leonid rode in the top of his command Chimera, the wind whipping past his face. His goggles and bandana kept the worst of the dust from his mouth and eyes, and, riding at the head of his tanks, he had a magnificent view of the battlefield. His bronze breastplate shone gold in the red afternoon sun and as he rode to battle he was filled with a fierce pride in his regiment.

Like Fierach, he too had reservations about this attack, but seeing so many tanks roaring forward at speed with the ground shaking to the tread of the Legio Ignatum, he was swept up in the glory of this charge. Ahead he could see the traitor lines, their dark fortifications raised high in an impossibly short time. Whoever was organising this operation must be working his men to death.

Leonid watched the two Warhounds tasked to his storming force race ahead, their speed incongruous for such large machines. Slower moving Reavers strode alongside his formation while the majority of the Legio advanced on the salient angle of the attackers' trench line - the point where it bent towards the south-west and could bring the least amount of fire to bear. The Titans were to smash through the salient with the guns on Tor Christo covering their exposed right flank with the tanks and men of the Jouran Dragoons covering their left.

At the same time, the Jouran armoured thrust would hit the east/west trench line, storming the trenches with four thousand warriors hell-bent on revenge. Leonid had allowed the true identity of those soldiers killed in the initial attack on Tor Christo to become known and the Dragoons were hungry to avenge them.

Once the Titans had established their breakthrough, they would link with the fighting in the trenches, allowing them to sweep forwards into the invaders' camp, wreaking whatever havoc they could before falling back in good order to the citadel and avoiding the inevitable counterattack.

On paper it was sound strategy, but Leonid was enough of a warrior to know that few plans survived contact with the enemy, and was prepared to exercise his own initiative if the situation turned sour. But looking at the armoured might at his command and the gargantuan god-machines that marched beside them filled him with supreme confidence.

Distant booms of artillery roared from behind him as the citadel's guns fired, supporting the attack with carefully arranged fire plans that would hopefully keep the invaders' heads down until the charge was right on top of them and the men and women of the Jouran 383rd smashed home.

Beneath the bandana covering his mouth, Leonid smiled to himself.

Forrix watched the charging Imperial forces approaching their lines with disinterest, knowing that their circumvallations were as secure as they could be. He stood at the salient angle of the lines, watching the Imperial Titans march towards them. The transparency of their plan was obvious even from here.

The guns of Tor Christo opened fire, sending screaming projectiles towards their lines, but Forrix had been building fortifications for thousands of years and was a true master of siegecraft. The high, earthen ramparts of his trenches absorbed the worst of the blasts and the damage inflicted was minimal. A few parties of slaves fled their work, but as soon as they broke cover they were shredded by the storm of explosions.

The guns from the citadel were also firing, wreathing the plateau in smoke, but Forrix had situated the first parallel beyond their range so the Imperial defenders were simply wasting ammunition. Thick grey smoke wreathed the plateau, obscuring the Imperial tanks, but the Iron Warriors in the bunkers were able to penetrate such petty obstacles as smoke with their gunsights.

The Titans of the Legio Mortis stood behind the main lines, ready to be unleashed at the foe once the Warsmith decreed where they should attack. The Dies Irae stood motionless just behind him, its mighty guns awaiting the coming conflict. Its form shimmered as the void shield generators powered up, sheathing the machine in layers of protective energy fields.

Diesel smoke and the choking stench of exhaust fumes filled the air as hundreds of armoured tanks rolled through the campsite, heading for the gateways in the defensive lines, ready to sally forth and engage the enemy. Gunners in artillery positions cranked their guns around to face the plain before the citadel, Tor Christo no longer their target for now.

Forrix could see Honsou and Kroeger marshalling their warriors for the coming battle, bellowing orders to the indentured soldiery and thrusting them into the trenches. He could practically feel their lust for battle and wished he shared it. But this conflict promised to be yet another that would eventually blur into a seamless life of slaughter for him.