The Golden Crusade
Before the crusade aimed at completely sealing off the Eye of Terror had even begun, the Imperium and the Tyran Sector were already preparing for it.
Chagatai returned to his sons, using his authority as a Primarch to assemble troops and fleets.
Guilliman and Lion's fleets, along with their sons—the Ultramarines, the Dark Angels, and all their successor Chapters—were already within those fleets and required no further mobilization.
The Harlequins and Usulan were withdrawing from their search for the Crone Sword to participate in the expedition against the Eye of Terror as much as possible.
And far from the front lines, Archmagos Belisarius Khor was delivering White Scars Primaris Space Marines into Chagatai's hands.
Thanks to Chagatai's wisdom, there had been no problems when the Primaris Space Marines were sent to the White Scars.
Everything proceeded extremely smoothly.
Before Chagatai returned, all the leaders participating in the expedition gathered together to name this crusade of immense significance.
The Golden Crusade.
After the Imperium of Man had been ravaged by Abaddon's Black Crusades twelve times.
Humanity finally launched a proactive assault upon the Eye of Terror, the Black Legion, and the lands occupied by countless traitors and heretics.
This was also the first proactive attack by the living beings of the Real Universe against the entities of the Warp.
Everything went smoothly during the preparations for the Golden Crusade.
Even the New Thunder Warrior Program was progressing smoothly.
Upon a battlefield shrouded in smoke.
In an Apocalypse-scale war being fought upon the surface of a daemon world.
Astartes, Cadian assault troops, the Mordian Iron Guard, and other elite Astra Militarum regiments were jointly assaulting a Black Legion fortress.
The weapons and equipment of the Black Legion's Chaos Space Marines were superior to anything recorded in any Imperial