Warhammer 40K: System Error, I Summoned the Arch-Traitor!

Chapter 184 - The Expedition Continues: Armageddon and the Maelstrom



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The two of them walked side by side into the strategic command hall.

The dome soared overhead. At the very center of the hall stood the statue of the Emperor of Mankind, its stone eyes gazing down upon everything below.

This had once been the sanctum of the Master of Mankind. Now it served as the coalition's war council chamber.

Kaelen and Horus weren't the first to arrive. Everyone else had been waiting.

Both sides of the long table were filled. Fulgrim and Konrad Curze, the two Legion masters, each held the head seat on their respective side. Purple-gold and pitch-black, starkly divided under the lights.

Behind them, Loken, Sevatar, and Cullen stood in solemn silence alongside other senior Astartes officers.

Further back sat over twenty representatives from the Astra Militarum, the Imperial Navy, the Knight Houses, and the Titan Legions, alongside red-robed Adeptus Mechanicus sages and an Abbess of the Adepta Sororitas in sacred armor.

The hall was packed with talent. Any single one of them could have commanded a war on their own. Right now, they sat as quietly as students waiting for the teacher to start class.

"I'm not late, am I?"

The moment Horus stepped through the door, he flashed that signature grin. It was like a struck flint — the slightly muted atmosphere of the room caught and lit immediately.

Wherever Horus stood, that was the center of the room. Every time.

"Three minutes." Fulgrim tilted his chin up slightly. "Not exactly the standard one expects from a supreme commander, my brother."

"Ran into some bad news on the way." Horus shrugged, easy, and let the subject slide.

He crossed the hall toward the center.

That spot was empty. It was always empty, always waiting for him.

He stopped there and looked down at the star map projection.

Holographic light rotated slowly in the air. Winding march routes traced the vast stretches of space the expedition fleet would cross next. Dense clusters of red dots scattered across the display like wounds in the starfield — every single one an Imperial world waiting to be rescued.

There were so many red dots. So many that the room went quiet just looking at them.

Loken stepped forward and offered the data-slate. Horus took it. His gaze moved across the screen, packed dense with every representative's requests, strategic assessments, and tactical opinions.

He didn't skim. He read it line by line.

For 5 minutes, the only sound in the hall was the occasional swipe of his thumb across the screen.

Nobody rushed him. Nobody coughed. Everyone waited.

5 minutes later, he set the slate down.

Then he began to talk with the representatives. One by one.

Not a broad "what are your thoughts." He called on them by name. He asked each of them directly.

Kaelen watched from the side and quietly committed every detail to memory.

He had no particular passion for command or administration. But Horus had always pressed him to learn, and had always been willing to teach him himself.

The Wolf King had said something once that Kaelen had carried with him ever since: Only through learning does one progress. I am willing to bring those I cherish along with me in that progress. Progress is a virtue.

After the individual talks came the open discussion.

Horus told the room plainly: what was written on the data-slate was the polished version. He wanted to hear what they actually wanted to say.

He asked them all, for now, to set aside their private interests and their defenses. The Astra Militarum shouldn't worry about the Astartes stealing the glory. The Adeptus Mechanicus shouldn't hoard secrets from the Knight Houses. The Navy shouldn't squabble with the Army over transport tonnage.

What he wanted was to build a force with real cohesion.

From anyone else's mouth, that kind of speech would have been nothing but polished words for a crowd.

From Horus's mouth, people believed it.

The room opened up. Everyone began to speak. Kaelen contributed a few points of his own — on flexible deployment along logistics supply lines, and on how to prevent command chain fractures when coordinating across multiple theaters.

He didn't speak long. But every point he raised was noted carefully by Horus and the representatives around the table. No one dismissed him as an outsider. Just as he didn't lose his nerve sitting in a room full of Astartes and primarchs.

The meeting's atmosphere was relaxed and efficient. No grim solemnity. No bureaucratic back-and-forth. It felt like the most productive quarterly strategy session you'd ever sat in at a well-run company.

Except what they were strategizing was how to crush every enemy standing between humanity and survival, in the least amount of time possible.

In the end, every issue came to the table, and every issue was resolved. Strategic direction confirmed. Tactical plans locked in. The interests of every faction present reconciled and protected.

Then, before the statue of the Emperor of Mankind, everyone rose. Right fists pressed to chests. They swore to uphold, to the death, the spirit and principles of what had been agreed here today.

Unity. Trust. Efficiency.

The coalition's primary mission going forward was clear: press the Unyielding Expedition, reclaim key Imperial worlds, and drive out xenos and Chaos forces wherever they were found.

On the star map, two locations stood out above the rest.

The first was Armageddon.

That name needed no explanation. It had once carried an older name: Ullanor.

It was on that world that Horus had knelt and received the Emperor of Mankind's coronation, and risen as Warmaster of the Imperium. The most glorious moment of his life. The pinnacle of the Great Crusade.

In the long years after the primarchs vanished, the planet had been retaken by Ork greenskins during the War of the Beast, then inexplicably teleported by the Adeptus Mechanicus to an entirely different star system.

Even that hadn't stopped the Orks. They kept coming, streaming in from across the galaxy like pilgrims drawn to a holy site. The Imperium had bled whole Legions into that world. Too many resources. Too much blood.

It had to be ended in one decisive stroke. And if the fighting went well, it might deal a crippling blow to the greenskins' war-making potential across the board.

The second location was the Maelstrom Zone.

That one came from Kaelen. He stood, pointed to the region at the star map's edge, that swirling pocket of Warp-torn space, and named the enemy that owned it.

Huron Blackheart.

Some of the representatives recognized the name. A rising Chaos power, built from the ruins of a once-loyal Astartes Chapter.

They filled Horus in one after another. Huron commanded a fleet so formidable that even Abaddon the Despoiler watched it with wariness. He held the Maelstrom like a fortress, used it to launch pirate-style raids that bled Imperial shipping lanes dry, and had spent centuries quietly, steadily expanding his reach.

Left unchecked, Huron might eventually become a worse problem than Abaddon himself.

Because Huron was younger. More pragmatic. And far better at walking the razor's edge between Chaos and cold reason.

Horus listened to all of it. Then he was silent for exactly 3 seconds.

He reached out and tapped the Maelstrom Zone on the projection.

The strategic plan for the Maelstrom was formally confirmed. Priority elevated to maximum. Resource allocation brought in line with the Armageddon front.

The meeting was over.

The representatives filed out, and every pair of footsteps sounded a little firmer leaving than they had arriving.

Horus stopped Fulgrim and Curze before they could go. He said a few things to them, the kind of words that only pass between brothers.

Fulgrim gave a quiet nod, turned, and departed with three Phoenix Guard officers at his back.

Curze nodded without a word. His dark figure and Sevatar's disappeared down the corridor together.

The hall went still.

Kaelen and Horus, Loken and Cullen, the four of them stood side by side, looking out over the empty long table and the star map that still glowed. The arcs of light tracing the march routes continued their slow, quiet flicker.

Like a promise no one had spoken aloud.

---

The next morning. Macragge orbit.

The coalition fleet put to sail under the light of the star. Hundreds of warships moved in formation, their engines burning blue-white, trailing long bright streaks through the void behind them.

The Emperor's Dream held position at the fleet's center, its golden hull burning against the dark like something that refused to be extinguished.

On the observation deck of the orbital station, Guilliman stood alone. The Armor of Fate caught the light streaming through the viewport. He watched in silence as the fleet shrank with distance, as the formations dissolved to points, as the last point of light finally slipped away into the depths of the star sea.

He raised his hand.

The sign of the aquila, offered to the void.

The expedition fleet sailed on, carrying steel and faith, into the burning stars.

➤ Next: The Great Brawl of Vigilus

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