Withering hails of bullets and las-bolts from the flank of the Mori bastion hammered the walls of the ravelin. He heard a roar of warriors unleashed far to his right and knew that Forrix and Kroeger were beginning their attack.

Dozens of warriors were clambering up the slopes of the ravelin amid the explosion of grenades and constant snap of lasgun fire. The Iron Warrior beside him lost his grip as a shell burst above him, tearing his head off in a fountain of blood. His heavy corpse smashed half a dozen warriors from the wall as he fell.

Honsou shook his helmet clear of blood, punching his fist deep into the wall and gripping onto a reinforcement bar as he saw a cluster of grenades slither down the wall towards him. He pressed his body flat against the wall as they detonated, blowing clear a chunk of grey rockcrete. Torn ligaments in his arms shrieked as the force of the blast lifted him from the wall, but his grip on the rebar held him firm.

Red runes winked into life on his visor, and he felt blood flowing along his limbs, but he pushed upwards, dragging himself up the wall.

The slope grew less steep as he climbed, reaching the broken sections of the wall pulverised by the siege tanks. Gunfire from below slackened as the Iron Warriors firing at the parapet now holstered their weapons and began climbing.

A face appeared above Honsou. He put a bolt through it and carried on upwards. He risked a glance behind him. Perhaps a dozen Iron Warriors were dead and they had yet to clear the ramparts. Honsou turned in time to see an Imperial Fist swing the crackling edge of a power sword towards his head. He threw himself flat against the wall, feeling the sword blade hack a portion of his shoulder guard away. He rolled as the sword swung again, cutting through the rockcrete and sliding free in a shower of orange sparks as it struck an embedded reinforcement bar.

Honsou dragged his own sword from its scabbard and rolled as he saw the Imperial Fist on the rampart draw back his sword for another strike. Honsou lunged, spearing his foe through the chest with his sword. He hurled himself over the parapet, barrelling into a group of Guardsmen rushing to plug the gap in the walls and landing in a tangle of limbs.

Honsou battered his elbows downward, hearing screams, feeling bones break and skulls cracking open.

He rolled to his knees, slashing low with his sword at a charging Imperial Fist, hacking his legs out from under him. Honsou reversed the grip on his sword and hammered the blade through the Space Marine's helm, dragging it free in time to block the swing of another sword, this time swung by an Imperial officer with a major's star on his chest.

Honsou blocked a clumsy thrust and kicked the man in the groin, shattering his pelvis and dropping him screaming to the ground.

'Iron Warriors to me!' he bellowed, clearing a space around him with wide sweeps of his sword. Bullets and las-bolts ricocheted from his armour.

Another two Iron Warriors climbed over the lip of the parapet, forming a wedge with Honsou at its point. Together, the Iron Warriors hacked a path through the Imperial Guardsmen, splashing their silver armour with blood.

An Imperial Fist sergeant saw the danger and charged towards Honsou, firing his plasma pistol as he ran. Honsou swayed aside, the beam streaking past him and punching through the helmet of an Iron Warrior as he pulled himself over the parapet.

Honsou gripped his sword two-handed and charged to meet the Space Marine, diving forward and rolling beneath the swing of his opponent's blade. He rose to his feet and cut high, decapitating the Space Marine in a single blow.

Perhaps a dozen Iron Warriors had gained the ramparts and more were flooding the walls as Honsou's wedge pushed further into the ravelin, pushing the enemy back before them. Honsou yelled in triumph as his men spread out along the walls, killing everything in their path. The Guardsmen fell back in the face of such savagery and the ramparts were his. The enemy retreat was practically a rout, a few Imperial Fists all that held it from collapsing completely.

Honsou leapt from the ramparts as he saw a reserve of Guardsmen with heavy weapons, commanded by a junior officer, lying in wait in the centre of the ravelin. He hit the ground and rolled, watching the officer gauging the correct moment to fire.

The officer's sword swept down and heavy weapon fire raked the inner faces of the ravelin, pitching four Iron Warriors from the walls. Bolter fire answered them and a handful of men fell, clutching gaping wounds in their bodies.

The crescendo of guns and screaming soldiers was powerful in its intensity as battle was joined across the walls and bastions. Smoke billowed from fires set by shell impacts and gunfire that had ignited the uniforms of the fallen.

More bolter shots tore amongst the Guardsmen as the officer swept his sword down again, but it was too late. Honsou was amongst them, hacking and killing with frenzied abandon. Blood spurted, limbs were severed and entrails spilled as he tore the beating heart from the defence.

Dozens more Iron Warriors were spilling into the ravelin itself. Yellow armoured Space Marines were like tiny islands of stubborn resistance, but Honsou could see they would soon be overwhelmed.

Ahead he could see the massive golden gate of the citadel, flanked by two high towers and topped with battered gun turrets. Without siege tanks it was inviolable, but to the right of the gate was the great breach and Honsou could see fierce fighting raging at its top.

'Iron Warriors, rally to me!' roared Honsou, bellowing to be heard over the din of battle. Raising his bloody sword, he set off at a run towards the breach.

The Primus Ravelin had fallen.

'Forward!' screamed Forrix from below the crest of the breach, his power glove crackling with deadly power. They were so close he could taste victory. His armour was dented and torn open, but he felt nothing, the arcane mechanics of his newly augmented body impervious to pain. He felt another impact against his chest and laughed insanely as the bolt exploded against his breastplate, the shell fragments scoring shallow gashes in his helmet.

The breach was wreathed in the smoke and confusion of battle. Bodies lay strewn about, both friends and foes. Three times they had taken the crest of the breach and three times they had been hurled back by Dorn's lapdogs.

He clambered up, pulling himself forward in great powered strides.

Then he was hurled backwards as a buried mine exploded beneath him, the ground rearing upwards in a pillar of smoke and fire. A chunk of rock smashed into his newly repaired helmet and shattered the visor, cracking it too badly to see through. Forrix rolled a few metres down the breach, before sliding to a halt in the loose rock.

Angrily, he pushed himself to his feet and wrenched off his ruined helmet, hurling it into the smoke above him. He could see dim shapes ahead and opened up with his combi-bolter, spraying the breach with fire. One figure dropped, but the others swung their weapons to bear at him.

A blast of gunfire ripped into the hazy figures, deadly fire from a reaper autocannon that swept them away in a hail of shells. Forrix glanced around him, seeing that his company had suffered fearsome losses to get this far. It would all be for nothing if they should fail now. Iron Warriors climbed past him towards the top of the breach.

He heard a great roar of victory from below and knew that the half-breed had succeeded in capturing the ravelin. But how Kroeger's attack on the eastern bastion was faring, he had no idea. He snarled and resumed his climb, shooting blindly into the smoke above him. Nearly twenty Iron Warriors in Terminator armour climbed with him, firing their weapons into the breach.