Remus reached the end of the Rhino and scrambled to his knees. He had no chance to weigh his options or consult his primarch’s words, and simply swung around the corner of the vehicle’s track units. The Salamander Terminator had found his feet, though Remus’s visor displayed numerous weakened points on his armour.

The Salamander war leader, perhaps sensing his presence, turned to face him. Remus met his gaze, eye lens to eye lens. Remus sighted along the length of his bolter, and though he couldn’t see beyond the snarling ceramite war mask, he felt he could see the warrior’s coal dark skin and infernal red eyes. Of course that was ridiculous, but there was a weak spot on the warrior’s faceplate, one that a skilled marksman could exploit…

Remus squeezed the trigger and the bolter spat a single shot. Though the weapon fired at supersonic speed, Remus felt he could trace its passage through the air. Even as fired, he knew the shot was true. It struck the Salamander square in the face and Remus watched as his visor registered the kill. The Terminator didn’t fall; the armour was too massive to let the wearer collapse, even in death.

Remus let out a breath, rolling onto his back and letting the exertions of this latest engagement drain from him. Though it had been among the shortest, it had been one of the most demanding.

High above the building, roaring Thunderhawks descended like carrion birds circling in anticipation of a feast.

Engagement 314

A COLD WIND blew down the basalt canyon, carrying dust from the high peaks of Macragge. Remus smelled the pinesap of highland evergreens and the crystalline sharpness of mountaintop tarns on the breeze. He crouched low behind a marker cairn, a three-metre cone of stacked volcanic rock with ancient markings that directed travellers to safe paths through the mountains, locations of water and shelter. Cut in the ancient cuneiform of Macragge, these markings would be unreadable to anyone not native to this world, meaningless even to another citizen of Ultramar.

It had been many years since Remus had run through these mountains as a boy, staggering in an exhausted, near-death state from one cairn to another as he fought for his place in the Ultramarines. Of all the boys that had set off on that last run, he alone had survived; the others dying one by one of heat exhaustion, dehydration, or falls from high cliffs, or being picked off by the vicious, cave-dwelling mountain cats that stalked the high peaks.

Tumbling through the bronze gates of the Fortress of Hera, Remus had been met by Captain Pendarron, the heroic warrior who had fought alongside Roboute Guilliman in the untamed lands of Illyrium before Gallan’s betrayal of the Battle King Konor. The captain had picked him up, dusted him down, and sent him to the apothecarion with a curt nod of approbation.

Thinking back to that time brought a welcome flush of endorphins, but it was a short-lived pleasure. That was another life ago, and nearly two centuries of war separated that young boy from the Legiones Astartes Remus had become. Decades of training still awaited that young boy, but they had been years of intense pressure, tribulation and, yes, joy. Proving himself worthy of a place within the ranks of the Ultramarines had been his greatest honour, and he still recalled his mother’s pride at seeing him march through the streets of Macragge clad in brilliant blue battle-plate.

He had never seen his mother again, yet the loss did not touch him as deeply as he felt it should. His mind had been reshaped in myriad ways, and though the capacity for sadness and emotion had not been removed, it took extreme stimuli to trigger emotions connected with his previous life as a mortal.

A crackle on the vox-network brought Remus out of his reverie, and he shook off thoughts of golden days and concentrated on the present dark ones. This campaign had been the toughest of all, for the Sons of Horus had consistently outfought and outmanoeuvred them at every turn. In space, the Warmaster’s fleets had battered through their picket lines, and flanking forces of stealthy ambush vessels had appeared from nowhere to wreak havoc within the Ultramarines precise battle lines.

World after world had fallen. Tarentus, Masali and Quintarn were gone, the loss of the latter planet bringing a lump of bile to Remus’s throat after all the 4th Company had gone through in their struggle against the Salamanders. Prandium was now lost, the devastation begun by the World Eaters now concluded by a viral bombardment that stripped the ruined planet of all living matter in a viral hellstorm. All that was left of Prandium was a barren rock.

Iax had been firebombed until the Garden of Ultramar was an ashen wasteland. No two campaigns the Warmaster waged were fought the same way, and Remus had heard whispers in the higher echelons of command that the planners in the grand strategium were running out of ideas to fight him. Remus knew that could not be true. The primarch’s writings would have a solution to this assault on Ultramar, it was just too complex and overarching a plan to be comprehended by mortals, even ones as cognitively enhanced as the Legiones Astartes.

Roboute Guilliman had never yet lost a war, and he certainly wouldn’t lose this one.

Macragge could not fall.

It just couldn’t.

Remus didn’t know whether to think of that as fact or wishful thinking.

Barkha scrambled over the rocky ground towards him, keeping low behind the fangs of rock that sheltered this element of the 4th Company. Thirty metres below, the floor of the canyon twisted a serpentine path through the mountains, the ground flat and hard-packed. Well away from the battles being fought in the lowland approaches to the Fortress of Hera, it had been decided that it was certain the Warmaster would move flanking forces through these canyons to open a second front against the Ultramarines last bastion.

The 4th Company guarded the passes to ensure no second front was opened.

‘They’re coming,’ said Barkha. ‘Sons of Horus armour units, with speeders and bikes in the vanguard. It’s a pretty small force, but there’s bound to be others threading their way over the mountains.’

That was true enough, but numerous elements of the 4th Company were watching the secret paths through the mountains.

‘What’s their separation like?’

‘Sloppy,’ said Barkha. ‘They’re in a hurry. The tanks are labouring, and the bikes are slowing down to keep close.’

Remus looked down into the canyon, hearing the distant rumbling of the enemy vehicles as they approached the killing box. The mountains of Macragge were a different order of inimical environment to any the Sons of Horus would have encountered before. Time and time again, the enemies of Macragge had been undone by its hostile geography. The Sons of Horus would be no different.

‘Pass the word. Fire on my signal. Target the lead tank and the rear tank. Trap them in the box and then work your way to the centre.’

‘Understood,’ said Barkha, and Remus heard the note of exasperation in the sergeant’s voice. The 4th Company had practised drills like these countless times, and didn’t need him to tell them how to run an ambush. Remus checked his bolter one last time and propped himself against a rock with a view through a knife-cut in the rocks before him. He could see down into the canyon, but the shadows and dark hue of the rock concealed him from view.

He overlaid a tactical schematic over the view of the canyon, seeing his warriors picked out in pale blue throughout the overlooking crags and gullies. There wasn’t an angle left uncovered, an escape route that wasn’t a death trap or a square centimetre of ground that couldn’t be reached by Ultramarines gunfire.

‘Easy meat,’ whispered Remus.

The noise of engines grew louder, echoing from the canyon walls. Remus heard the chugging breath of Rhinos, the deeper, throaty rumble of Predators and the roaring thunder of at least one Land Raider. The high-pitched bleat of bikes carried over the noise, and Remus kept his head down as a pair of speeders zipped into view.