Artellus Numeon - Drop Site Massacre: The Pyre Guard's role during the Horus Heresy is not well known to Imperial scholars; what is for certain is that the XVIII Legion, along with the Iron Hands and the Raven Guard, were part of the first wave of Loyalist attackers during the Drop Site Massacre of Istvaan V. After the announcement of the Warmaster Horus' treachery against the Emperor and the destruction of the four open Traitor Legions' (the Sons of Horus, Emperor's Children, Death Guard and the World Eaters) remaining Loyalists during the Battle of Istvaan III, the Emperor ordered seven full Legions of Space Marines to attack the Forces of Chaos serving his beloved son and former friend. But amongst those seven Legions, four were already secretly Traitors to the Imperium and devotees of the Ruinous Powers.Seconds after the first drop-ship pierced the cloud layer, batteries of emplaced guns erupted across metres of earthworks dug along the Urgall Depression. Flak fire filled the sky like upwards-pouring rain, chewing through wing and fuselage, detonating arrow-headed cocoons of metal and spilling their lethal payloads into the air. It barely dented the assault, and when the Imperial loyalists finally made planetfall, over forty thousand legionaries tramped out upon the scorched earth. Of their initial complement, only fifteen of the Salamanders' ships and eleven Drop Pods would not make the surface intact. Nigh-on full Legion strength would be levelled against Horus and his rebels. The Salamanders hit along the left flank, the Raven Guard the right and Ferrus Manus with his Morlocks dead centre.Black sand cratered by ordnance made for uncertain footing. As the vast armies of the three loyal Primarchs ran from the holds of ships or emerged through the dissipating pressure cloud of blooming drop-pods, several legionaries faltered and slipped. Sustained bolter fire met them upon planetfall, and hundreds amongst the first landers were cut down before any kind of beachhead could be established. Fire was met with fire, the drumming staccato of thousands of weapons discharged in unison, their muzzle flashes merging into a vast and unending roar of flame. Dense spreads of missiles whined overhead to accompany the salvo, streaking white contrails from their rockets. Sections of earthworks erupted in bright explosions that threw plumes of dirt and armoured men into the air. Las bursts lit up the swiftly following darkness, spearing through tanks and Dreadnoughts that loomed behind the foremost ranks of enemy defenders, only for return fire to spit back in reply. Flamers choked the air with smoke and the stink of burning flesh, as yet more esoteric weapons pulsed and shrieked. It was a cacophony of death, but the song had barely begun its first verse.The right flank was swollen with warriors of the XVIII. Salamanders teemed out of their transports, quickly coming into formation and advancing with purpose. The black sand underfoot was eclipsed from sight, as a green sea overwhelmed and overran it. Vexilliaries held aloft banners, attempting to impose some order on the emerging battalions. Methodical, dogged, the XVIII Legion found its shape and swarmed across the dark dunes. At the forefront of this avenging wave was Vulkan, and to his flanks the Firedrakes. Lumbering from the metal spearheads of Drop Pods, the Terminators amassed in two large battalions. They were dauntless, dominant, but not the most implacable warriors in the Salamanders' arsenal. Contemptors, striding through the smoke, laid claim to that honour. Great, towering war engines, the Dreadnoughts jerked with the savage recoil of Graviton Guns and Autocannons. Not stopping to see the carnage wreaked, they slowly tramped after the rushing companies of Legionaries in small cohorts, attack horns blaring. The discordant noise simulated the war cries of the deep drakes and was pumped through vox-emitters to boost its volume.Disgorged by Thunderhawk Transporters, Spartan Assault Tanks, Predators-Infernus and Vindicators disembarked at combat speed, tracks rolling. The battle tanks rode at the back of the line with a steep ridge behind them, anchoring the dropsite with their armoured might. Three spearheads were driven at the traitor's heart, two black and one green, all determined to bring down the fortress squatting at the summit of the Urgall Hills that overlooked the expansive depression. In seconds the shifting sand became as glass, vitrified by the heat of tens of thousands of weapons, and cracked underfoot.Vulkan ordered his sons to take the ridge line to gain higher ground. Shells pranging off his armour, the primarch took up the vanguard position, whilst his chasing Pyre Guard tried to keep pace. Behind the Pyre Guard, the stoic advance of the Pyroclasts struggled to keep up as they laid down sheets of burning promethium in front and to the flanks. The Terminator-armoured Firedrakes were also slipping back, unable to compete with the Primarch's speed, and Numeon began to see that there was a realistic danger of becoming estranged from the rest of the Legion. Adding their strength to the spearhead the Primarch was forging, the 15th Company Reconnaissance took up fresh position. Their charge line would take them in alongside the Pyre Guard, able to maintain pace where the bulkier Firedrakes and Pyroclasts could not.As if sensing that his Legion was losing him, Vulkan slowed but a fraction as the fire-blackened lip of the outermost trench drew close. Hunkered within the partially sundered defences, the Legionaries of the Death Guard brought guns to bear. The XIV Legion were hardy fighters -- the Salamanders had fought alongside them at Ibsen, but those days were gone and now allies had turned into enemies. The flame storm and the ferocity of Vulkan's attack had scattered the defenders but they were rallying quickly and now counter-attacked from three separate channels. Although the trench network was wide enough for three legionaries to stand abreast, the fighting was thick and fierce. Wilting before his charge, the defenders sensibly chose to hang back and harry the primarch with a welter of bolter fire. Meeting it head on, the primarch shrugged off the shell damage as the brass casings broke apart against his near-inviolable armour.Across the entire Urgall Depression, hundreds of battles between Legionaries were fought. Some were company-strong, others were squads or even individuals. There was no scheme to it, just masses of warriors trying to kill one another. Most of the Loyalist troops had moved on from the dropsite and were engaging Horus’ rebels at the foot of his fortifications, but a few still occupied this beachhead. Scattered groups of traitors had spilled out as far as the dropsite but were quickly destroyed by the troops holding it. These were skirmishes, though, and nothing compared to the greater battle. As the 15th Company pressed the attack against the retreating Death Guard forces, a dirty cloud, too thick and too low to be fog, rolled down the slopes. It spilled into the myriad trench-works, funnelled by the conduits of hewn earth. And it was fast. In seconds it had cleared the no-man’s-land between the previous trench and the next bank of fortifications and was hurtling at Nemetor and his warriors. It overtook the Death Guard first, who adjusted respirators before the miasma hit as if they knew it was coming. It was a deadly gas attack.The Legion armoury was vast, and not all of its weapons were as obvious as a Bolter or as noble as a sword. There were those who wielded devices of much more insidious potency -- the slow and agonising ones, the weapons that forever scarred both the bearer and the victim. They did not discriminate and made no allowance for even the strongest armour. From the vaunted champion to the lowliest mortal, they were the great levellers and their works were terrible to behold. More than a hundred of the reconnaissance company collapsed, choking and spitting blood. Many of the 15th didn't wear battle-helms, preferring to be unencumbered for the stealth work at which they excelled. These warriors had suffered the worst. Skin sloughed away by virulent acids, ravaged by pustules and choking on vomit, eyes drowning in pus from the dirty bomb, there was almost nothing left of them but half-armoured carcasses. Dozens more were hacked apart or shot down by resurgent Death Guard attacking in the confusion.The numerically superior Death Guard had already overrun the smaller reconnaissance company and were attempting to encircle the rest of the Salamanders. Vulkan single-handedly prevented that, hitting the overlapping warriors and cutting them apart with his flaming sword. First Captain Numeon and the Pyre Guard joined him fractionally later and a dense, chaotic melee erupted. As battle continued to rage all around them, the din of the melee was pierced by savage and guttural war cries. A ruddy smog was sweeping across the battlefield, fashioned from blood-drenched mist and the smoke generated by thousands of fires. Caught in a crosswind, it slashed in from the east and brought with it the brutal challenge of a Legion that revelled in war. It was the XII Legion -- the World Eaters.Ash-fall from the many thousands of fires turned the sky grey. It baptised a cohort of warriors, clad to various degrees in ancient gladiatorial trappings and wielding ritual caedere weapons. They were the Rampagers, a deadly breed even amongst the Eaters of Worlds, and a throwback to Angron's incarceration as a slave-fighter. Bellowing guttural war cries, they charged ahead of a Contemptor Dreadnought to engage the Salamanders. Emerald-armoured Astartes balked at what the battle-maddened World Eaters attempted. Though there was no more than thirty men - just three squads - they charged over a hundred. Several went down to sporadic bolter fire. Some were clipped by shrapnel but kept on coming. Only those too injured to fight, unable to run because of missing limbs or critical wounds were halted. Something urgent and terrible spurred them on. Even when they were the War Hounds, their reputation in battle, particularly close-quarters, was fearsome. As the reborn World Eaters under Angron, they had become something else. Rumours abounded within the ranks, of arcane devices that manipulated the legionaries' tempers, simulacra of the ones embedded in Angron's skull by his slavers. Now that the Salamanders saw them, ignoring pain and injury, frothing with frenzy, they believed those stories to be true.As the Salamanders and World Eaters fought in bloody close-quarters, elsewhere on the slope, a much larger force of Firedrakes fought Angron's personal bodyguards, the Devourers, to a bloody stalemate. For once, the Lord of the Red Sands was close to his Honour Guard. Angron bellowed a challenge to his brother Primarch. Vulkan's name was heard amongst the guttural syllables of the World Eater's native tongue. Anointed in blood, partially obscured by scudding clouds of smoke and shimmering heat haze, Angron continued to bellow his challenge, this time in High Gothic, "Vulkan!" His voice was like the fall of cities, rumbling and booming across the vast battlefield. Angron jabbed down to his brother with one of the motorised Power Axes he carried. Its blade was burring, roaring for blood. "I name you high rider!"Farther down the slope, Vulkan gripped the haft of his immense warhammer Dawnbringer and went to meet his brother's challenge. But before the two Primarchs could come to blows, an arcing salvo from one of the traitor gun emplacements spear-headed a missile up into the air and all the way down until it struck part of the slope between the two Primarchs. A firestorm lit the hillside, several tonnes of incendiary ordnance expressed in the expansive bloom of conflagration. It swept outwards in a turbulent wave, bathing the lower part of the slope in heat and flame. This was nothing compared to its epicentre. Firedrakes were immolated in that blast, blown apart and burned to ash in their Terminator Armour. Though Vulkan was wreathed in flames, he stepped from the blaze unharmed. The remaining Firedrakes gathered to him, tramping over the dead where they had to. Mauled as they had been by the World Eaters, Vulkan knew that his warriors had suffered but would not stop until they were dead or the battle was over. But it was grievously attritional, and he was not ashamed to admit relief when he heard that the reinforcements coming in to make planetfall behind them. Hundreds of landers and drop-pods choked the already suffocating sky, emblazoned with the iconography of the Alpha Legion, Iron Warriors, Word Bearers and Night Lords. The Primarch merely watched impassively as the manifold shuttles touched down and the loyalists took up position on the edge of the depression. Of Angron, there was no sign. The firestorm had beaten him back, it seemed, and now with the arrival of four more Legions, the Lord of the Red Sands had ordered a retreat.Both the Raven Guard and the Salamanders withdrew towards their drop site to give their recently arrived reinforcements a chance to earn glory against the Traitors. Vulkan and his brother Corax tried to persuade their fiery-tempered brother Ferrus Manus to do the same. But the Gorgon would not be dissuaded from his task. The scent of blood was in the air, and so, the Iron Hands pressed the attack against the retreating Traitor forces. Unknown to the Loyalists, the drop site had been fortified by the four secret Traitor Legions, who had been intended to form the second wave of the Imperial assault on Horus' forces. While the retreat of Horus' rebels was ragged and disorganised, the warriors of the XVIII and XIX Legions fell back in good order. Tanks returned to column, rumbling slowly but steadily back down the slope. The scorched trenches emptied as legionaries filed out in vast hosts, company banners still flying. They were battered but resolute. The dead and injured came with them, dragged or borne aloft by their still standing brothers. It was a great exodus, the black and green ocean of war retreating with the tide to leave the flotsam of their slain enemy behind it.On the northern side of the Urgall Depression, a fresh sea made ready to sweep in and carry all of the mortal debris away. Across from the muster field of the Salamanders, which was little more than a laager of drop-ships, were the Iron Warriors. Armoured in steel-grey with black-and-yellow chevrons, the IV Legion looked stark and stern. They had erected a barricade, the armoured bastions of their own landing craft alloyed together, to bolster the northern face of the slope. Great cannons were raised aloft behind it, their snouts pointing to the ash-smothered sky. A line of battle tanks sat in front, bearing the grim icon of a metal-helmeted skull. And in front of that, Iron Warriors arrayed in their cohorts, thousands strong. They held their silence and their weapons across their bodies, with no more life than automatons. Not a single Legionary about the XVIII stood idle. Yet the Iron Warriors, the entire muster on the northern slope, neither spoke nor moved beyond what was necessary to assemble.Not one responded to the Salamanders' hails. Only the wind kicking at their banners gave any sense of animus to the IV Legion throng. Only when Vulkan started in the direction of his brother, Perturabo, the Lord of Iron returned the Lord of Drakes' gimlet gaze with one of his own. It was only at that moment, did Vulkan realise that they had been betrayed. More than ten thousand guns answered, the weapons of their allies turned on the Salamanders with traitorous intent, crushing the Loyalists between the hammer of Horus' forces and the anvil of the fortified drop site. Wrath drove Vulkan up the side of the hill, that and a sense of injustice. The ignoble actions of his brother primarchs had wounded Vulkan to the core, far deeper and more debilitating than any blade. Vaunted warriors all, the Pyre Guard could scarcely keep up.Battle companies followed in the wake of their lords, captains roaring the attack as thousands of green-armoured warriors chased up the slope to kill the sons of Perturabo. Withering crossfire from both the north and south faces of the Urgall Depression cut down hundreds in the first few seconds of deceit. The XVIII Legion was shedding warriors like a snake sheds scales. But still they drove on, determined not to back down. Tenacity was a Salamander’s greatest virtue -- that refusal to give in. Upon the plains of Isstvan V, against all of those guns, this quality almost ended the XVIII Legion. Only as the majority of the Salamanders crested the first ridge, did they first see the arc of fire. It trailed, long and blazing, into the darkening sky. The tongue of flame climbed and upon reaching the apex of its parabola bent back on itself into the shape of a horseshoe. Rockets screaming, it came down in the midst of the charging Salamanders and broke them apart.A savage crater was gored into the Urgall hills, like the bite of some gargantuan beast resurrected from old myth and birthed in nucleonic fire. It threw warriors skywards as if they were no more than empty suits of armour, bereft of bone and flesh. As a bell jar shatters when dropped onto rockcrete from a great height, so too did the Legion smash apart. Tanks following after their lord Primarch were flung barrel-rolling across the black sand with their hulls on fire. Those vehicles in the mouth of the blast were simply ripped apart; tracks and hatches, chunks of abused metal torn to exploded shrapnel. Legionaries spared death in the initial blast were eviscerated in the frag storm. Super-heavies crumpled like tin boxes crushed by a hammer. Crewmen boiled alive, legionaries cooked down to ash in that furnace. It went deep, right into the beating heart of the Salamanders ranks. Only by virtue of the fact that they were so far ahead were the Pyre Guard spared the worst.With immense kinetic fury, it threw them apart and smothered their armoured forms in a firestorm. An electro-magnetic pulse wiped out the Vox, a threnody of static reigning in place of certain contact. Tactical organisation became untenable. In a single devastating strike, the Lord of Iron had crippled the XVIII Legion, severed its head and sent its body into convulsive spasm. Retreat was the only viable strategy remaining. Droves fell back to the dropsite, trying to climb aboard ships that were surging desperately into the sky to outreach the terrible storm of betrayal below. It was not a rout, though for any force other than the Legiones Astartes it would have been, faced with such violence. Many were cut down as the traitors threaded the air with enough flak to wither an armada.Despite a heroic defence, the three Loyalist Legions who took part in the battle on Istvaan V were practically destroyed; all but a handful of Battle-Brothers fell on that fateful day and the Primarch Ferrus Manus of the Iron Hands was beheaded by his former best friend Fulgrim, the Primarch of the Emperor's Children. After this sad defeat, the Salamanders, as well as the other two betrayed Space Marine Legions, were unable to perform any further tasks the Emperor had planned for them and spent the rest of the Heresy rebuilding their shattered forces. Both Vulkan and his brother Corvus Corax survived the ambush on Istvaan V. Conflicting reports by the few survivors stated that Vulkan, also gravely wounded, had to be dragged away from the fight onto a Thunderhawk gunship by three of his Pyre Guard and then managed to escape back to Nocturne. But the reality of the Salamanders' Primarch's fate proved to be far more dire.