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  Remus clamped his bolter to his thigh and issued the withdrawal order, one of two dozen permitted options available to him. With smooth precision, the Ultramarines began falling back by squads as the Talassar Auxilia filled the killing ground before the wall with las-fire. The Mechanicum engine, though not designed as a war machine, was nevertheless equipped with a fearsome array of defensive weaponry. As its enormous treads ground it away from the battle, the barking roar of its close-in guns ripped overhead, the sound strangely flat and without the usual percussive banging of massed bolters. Artillery pieces launched a last volley over the walls before turning and racing up the winding road through the mountains.

  Remus turned and dropped from the wall, joining Sergeant Barkha and the depleted ranks of his command squad. Ithus, Helika and Pilus were gone, which left his squad dangerously under strength, but the primarch’s writings had considered such an eventuality, and Remus acquired replacements from those squads who had come through the fighting unscathed.

  Behind them, the Death Guard finally reached the wall, forcing their way over it as the defenders made their escape. As the Ultramarines crested the ridge behind the wall, Remus sent a coded burst transmission to the Mechanicum adept in the gargantuan construction engine. Seconds later, a controlled series of detonations brought down the valley walls in a thunderous avalanche. It was little more than a delaying tactic. The Death Guard would break through before long, but it was enough for now.

  Barkha nodded to him as they retreated into the mountains.

  ‘We’re running out of room,’ said Barkha. ‘You think we’ve done enough to break them against the walls of Castra Tanagra?’

  Remus didn’t answer right away. The tactical plots of kill-to-casualty ratios were scrolling down his screen. It made for grim reading, but they were still within the parameters set by the predicted conditions of the engagement. Overviews from the grand strategium filtered through the tactical information, revealing the extent to which the Death Guard had been bled white by constantly hammering the Ultramarines fortifications.

  ‘It looks like it,’ he replied. ‘The other Chapters have done well.’

  ‘Not as well as us, though?’ asked Barkha.

  ‘No, not as well as us,’ said Remus. ‘No one outdoes the Troublesome Fourth, eh?’

  ‘Not on my watch,’ agreed Barkha.

  Remus liked the heart his sergeant displayed, pleased to hear such proud aggression in the warrior’s voice. It seemed the primarch’s purely doctrinal approach to war was holding up to the vagaries of battle.

  But this was simply one fight, and one opponent of many ranged against them.

  The real tests would come later.

  Engagement 136

  The holo-pict projected above the glossy surface of the plotter cast a stark light around the grand strategium. It folded sharp shadows around the gleaming walls and bleached deeply tanned faces of colour. The air was thick and close, redolent with the toxic oils and caustic unguents smouldering in the Mechanicum’s censers. It smelled of engine oil mixed with at least a dozen poisonous elements, and though it was Mechanicum witchery, it was certainly effective. The Legiones Astartes endured these effluvia without effect, but the mortals within the grand strategium coughed and rubbed eyes that constantly streamed with tears.

  Remus Ventanus didn’t know if they were tears engendered by the petrochemical irritants in the burners or the sight of so beautiful a world being destroyed. A measure of both, he surmised.

  He stared at the desolation of Prandium and wanted to weep. The most beautiful world of Ultramar by any reckoning, its wondrous forests, sculpted mountains and shimmering lakes were either burning or wreathed in smoke and choked with pollutants.

  Never afraid of extreme measures, Angron had let slip his World Eaters in the most vicious way imaginable. Remus had once heard his primarch say that Angron’s Legion could succeed where all others would fail because the Red Angel was willing to go further than any other Legion, to countenance behaviour that any civilised code of war would deem abhorrent.

  Seeing what had been done to Prandium, Remus understood completely.

  This was no honourable war, this was butchery and destruction embodied. The primarch’s great work could surely never have contemplated war with so terrible a face.

  The World Eaters had dropped on Prandium after a punishing saturation bombardment that levelled most of its great cities and set the world ablaze from pole to pole. In truth, there was little worth saving. Millions of people were dead and the detonations of volatile munitions had polluted the atmosphere and seas for millennia to come.

  Yet Prandium was still valuable. Its orbital track passed close to the coreward jump-point, meaning that whoever controlled Prandium could control entry to Ultramar. Even if Prandium was reduced to a barren, lifeless rock, it was still a world of Ultramar, and nowhere trod by Roboute Guilliman would be surrendered without a fight.

  Coming so soon after the devastation wrought on Calth’s sun, it seemed to Remus that their worlds were being torn apart piece by piece. Like an ancient, crumbling standard removed from its stasis vault in the Fortress of Hera, the warp and weft of Ultramar’s fabric was coming undone. Alone among the many savage assaults tearing at the Ultramarines empire, the invasion of Talassar had been repulsed. Driven on by their apparent success, Mortarion’s warriors had over-extended their forces and been left dangerously exposed when they finally hurled themselves at the mountain fastness of Castra Tanagra.

  Elements of the 4th, 9th and 45th Companies had garrisoned the fortress, and as the Death Guard attacked, the encircling horns of the 49th, 34th, 20th and 1st Companies drew in and completed the destruction. It had been an uplifting moment, yet Remus could not see how something similar could be done here.

  Surrounding the plotter, their faces grim and carved from granite, were the captains of fourteen of the Ultramarines battle companies, together with their lieutenants, senior sergeants and savants. Battle-logisters pumped information into the plotter, real-time strategic data that depicted a world torn apart by war.

  A world dying before their very eyes.

  ‘Fifth Company manoeuvring into position,’ said Captain Honoria of the 23rd. ‘Seventeenth moving in support.’

  ‘Enemy forces engaging the Twenty-fifth,’ said Urath of the 39th.

  ‘Eastern flank of Adapolis is folding,’ commented Evexian of the 7th. ‘They’ll break through in a matter of hours. I’m ordering the Forty-third and the Thirty-seventh to fall back.’

  ‘Are the Thirteenth and Twenty-eighth in position to meet the northern push?’ asked Remus.

  ‘They are,’ confirmed Honoria. ‘World Eaters Third, Fifth and Ninth are pushing hard at the borders of Zaragossa Province. If we don’t send in reinforcements, we could lose the entire western flank.’

  Remus circled the plotter with his hands behind his back, looking for some flaw in Angron’s battle plan. As senior captain in the grand strategium, he had overall command of Ultramarines forces on Prandium, a level of command he had never before held, but the primarch himself had made the appointment.

  Why had he been chosen? There were others in the grand strategium with more experience. Since Talassar, Remus and the 4th Company had fought dozens of smaller actions, each time emerging victorious, but each of them had been a company-level engagement, with no more than a few thousand warriors at his command.

  This was another strata of warfare entirely. To command the defences of an entire world was something that Remus had, of course, trained for but never actually done. The primarch’s teachings were indelibly etched on his mind: options, variables, parameters, action paths, outcome responses and a thousand detailed plans covering every possible eventuality of war.

  It had worked on Talassar, and Remus had to trust that it would work here.

  He stepped up to the tactical plotter and took in the strategic
overview in a heartbeat. The motion of armies, divisions and cohorts – a thousand elements of planetary warfare – was a spider’s web of furious advances, flank marches, brutal battles and encirclements. At Pardusia, the 19th Company had been all but destroyed, and the World Eaters had powered north through the wastelands of what had once been ornamental pasturelands where wild horses had roamed freely and rare flora, virtually extinct in Ultramar, had again bloomed in glorious bursts of kaleidoscopic colour.

  The assembled captains glared at him, resentful at sending their brothers to die following orders that broke the cohesion of the Ultramarines defence lines. Arcs and lines of blue snaked across the map at random, each one an isolated bastion of Ultramarines, Defence Auxilia and requisitioned Imperial Army units.

  ‘What are your orders, Captain Ventanus?’ demanded Captain Honoria.

  Remus stared at the map, feeding the current situation through the filters of the primarch’s work. Orders presented themselves to him, but they made no sense. He checked his conclusions again, knowing they were correct, but checking them anyway.

  ‘Order the Twenty-fifth and the Seventh to realign their frontage,’ ordered Ventanus. ‘The Seventeenth is to halt and hold position.’

  ‘But the Fifth,’ protested Urath. ‘They’ll be cut off without the Seventeenth covering their flank.’

  ‘Do it,’ said Remus.

  ‘You will condemn those warriors to die needlessly,’ said Honoria, gripping the side of the plotter tightly. ‘I cannot stand by and watch you lose this world and our Legion’s best and bravest with such insanity.’

  ‘Are you questioning my orders?’ asked Ventanus.

  ‘You’re damn right I am,’ snapped Honoria, before remembering himself. The captain of the 23rd took a deep breath. ‘I know what you did on Calth, Remus. Damn it, we all respect you for that, and I know you have the primarch’s ear. He has his eye on you for great things, I know that, but this is madness. Surely you must see that?’

  ‘Question my orders and you question the primarch,’ said Remus softly. ‘Is that really a stance you wish to take, Honoria?’

  ‘I question nothing, Remus,’ said Honoria guardedly. He swept his hand out to encompass the disastrous tactical situation on the projection of Prandium. ‘But how can those manoeuvres halt the World Eaters? The Red Angel’s butchers are gutting Prandium, and you are helping them to do it.’

  Remus held his tongue. For all that he agreed with Honoria’s sentiments, he had to trust that the primarch knew what he was doing. To try and understand the workings of a mind crafted by the genetic mastery of the Emperor was as close to unattainable as it was possible to be. The leaps of imagination, intuition and logic the primarch of the Ultramarines could make were unreachable to anyone save another primarch. And even then, Remus doubted any of Roboute Guilliman’s brothers could match his grand strategic vision.

  Yet what he had devised and passed down to them would only work if every cog in the machine was turning in the same direction. Honoria, for all his courage and honour, was twisting the machine’s workings. And that couldn’t be allowed. Not now.

  ‘You are relieved of command, Honoria,’ said Remus. ‘Remove yourself from this post and have your lieutenant step up.’

  ‘Ventanus, wait–’ began Evexian.

  ‘You wish to align with Honoria?’ said Remus.

  ‘No, Captain Ventanus,’ said Evexian with a curt bow. ‘But even you must admit that your orders appear somewhat… contradictory. You know this, I can see it in your eyes.’

  ‘All I need to know is that my orders bear the authority of the primarch,’ said Remus. ‘Do any of you believe you know better than our progenitor? Can any of you say that you have a better grasp of the nuances of war than our sire?’

  Silence provided Remus with all the answer he needed.

  ‘Then carry out my orders,’ he said.

  Prandium burned. Smaller Ultramarines icons winked out as they were destroyed, and the angry red icons of the World Eaters slowly broke apart like ripples of blood. No part of Prandium was left unscathed. The beautiful wild woods of the southern provinces were ashen, atomic wastelands, the crystal mountains of the east irradiated with toxic fallout that would take thousands of years to dissipate. Glorious cities of soaring gold and silver marble had fallen to ruin, pounded to rubble by orbital barrages that wiped them from the face of the world as if they had never existed.

  What had begun as a worldwide conflict had degenerated into a thousand or more scrappy brushfire wars waged between isolated battle groups. Ultramarines forces fought within a few miles of one another, but might as well have been on different worlds for all the support they could provide to one another.

  Remus felt as though he was sinking fast, already regretting his decision to remove Honoria from the command echelons of the grand strategium. Hadn’t he spoken of the value of a naysmith with Barkha? Didn’t every leader need a voice of dissent at his ear to force him to question his decisions?

  He searched the tactical plot for any sign of hope, wondering where he had gone wrong. What could he have done differently? What aspect of his primarch’s teachings had he failed to heed? He had reacted to every development with a rigorous application of the new doctrines, yet Prandium was on the verge of being lost forever.

  ‘Push the Thirteenth forward,’ he said, as automatic memory called up yet more of the primarch’s lessons. ‘Bolster the Seventeenth, and order the Eleventh to reform to flank the World Eaters advancing on Thardonis. Advance to contact and pin them in place.’

  ‘So ordered,’ replied Urath.

  ‘Order the Eighth Battle Group to withdraw to the borders of Ixian Province. Mechanicum units to cover and pioneers to establish temporary fortifications,’ said Remus as yet more tactical variables fed into his precise recall. A pattern emerged, and Remus began to appreciate just how tenuous the World Eaters position was. It had cost blood and lives to bring them to this point, but only now did Remus see how delicately balanced this grand strategy had been.

  ‘To win the greatest victory, one must take the greatest risks,’ the primarch had told him on the rad-wastes of Calth.

  ‘You never take risks,’ countered Remus.

  ‘Not that you would know,’ replied Guilliman.

  As the myriad situational variables displayed on the plotter flooded into the processing centres of Remus’s consciousness, the answers and manoeuvres required leapt to the forefront of his brain. He had heard it said that the greatest generals were those who made the fewest mistakes, but that was nonsense of the highest order. The greatest generals were those who planned for every eventuality and knew exactly how their foes would fight. Seeing the breathtaking beauty and complexity of the stratagems unfolding in his mind, he knew without a doubt that Roboute Guilliman was just such a general.

  The words virtually said themselves, using him as their conduit to life.

  ‘Order Battlegroup Ultima to realign its frontage along the River Axiana,’ he said. ‘Ninth and Twenty-fifth to alter the direction of their advance. North-east to grid reference six-nine-alpha/eight-three-delta.’

  The captains followed his orders without question, but Remus wasn’t done. Orders poured from him, each one spat like a poisoned dart into the heart of the enemy commander. His subordinates could barely keep up with him as he sent manoeuvre orders into the field with breathtaking rapidity. Confusion lit every face, but as the worldwide stance of the Ultramarines armies began to realign and enact Remus’s orders, he watched those same faces transform into expressions of wonderment.

  In the centre of the Praxos Territories, a cluster of red icons, representing one of the main World Eater battlegroups, now found itself surrounded on all sides as previously isolated Ultramarines units merged and swung around like closing gates to trap it within a deadly killing zone. Within minutes those icons were winking out as the combined firepower o
f three Ultramarines battle companies flensed the region with artillery, massed bolters and overlapping fields of fire from cunningly positioned Devastators.

  All across Prandium, World Eater cohorts were suddenly surrounded and cut off from one another as their hot-blooded aggression pushed them straight into the Ultramarines guns. The effect was akin to a million dominos ranked up in seemingly random patterns that tumbled together to create a masterpiece of kinetic energy at work. Ultramarines companies that had been in full retreat swung around to link with their brothers to seal the World Eaters in deadly traps from which there was no escape.

  Like the most graceful ballet, the Ultramarines danced to the tune of Remus’s commands, working together in flawless harmony: an elegantly and perfectly designed killing machine. One by one, the red icons of the invaders winked out, while those of the Ultramarines remained a steady blue. Casualty indicators began dropping, until eventually falling to zero. And the World Eaters continued to die.

  Within an hour, the battles were over and Prandium was saved.

  ‘I don’t believe it,’ whispered Urath as reports of secure battlefields chimed in from all across the ravaged world.

  ‘It doesn’t seem possible,’ breathed Evexian. ‘So fast, so merciless.’

  In truth, Remus was having a hard time believing the end had come so swiftly. It was one thing to have trust in the primarch’s vision for his great work, quite another to see it in action.

  ‘What’s our operational effectiveness level?’ asked Remus.

  His captains hurried to collate the information, filtering in reports from the field, casualty reports, ammo expenditure levels and unit degradation ratios. Reports streamed across the plotter, a few in red, fewer in orange, but the majority in a healthy green. Urath summed up the incoming flow of information, but Remus needed no interpretation of the data, the visual results were clear enough.

  ‘Seventy-seven per cent of units in the field report immediate battlefield effectiveness,’ said Urath. ‘Eight per cent are at minimum or unsafe levels of readiness, and a further thirteen per cent are at dangerous threshold levels of unit effectiveness. Only two per cent are combat ineffective.’