In the grim darkness of the far future there is only war The saga of WARHAMMER 40,000 comes to Marvel Comics! MARNEUS CALGAR, the legendary Chapter Master of the Ultramarines, leads his elite Space Marines against humanity's greatest threats in a galaxy engulfed in endless war. Kieron Gillen (UNCANNY X-MEN, JOURNEY INTO MYSTERY, The Wicked + The Divine) spearheads the initiative with this introductory miniseries, illustrated by Jacen Burrows (PUNISHER: SOVIET, MOON KNIGHT, Crossed)--and we're just getting started! Now, witness Marneus Calgar's never-before-told origin story, from his beginnings on Nova Thulium, to his campaigns in the Black Crusades, and to the unfolding mystery of the BLACK ALTAR, as a deadly threat from his past reemerges to threaten the present of the Ultramar system. This all-new tale is essential reading for 40K aficionados, as well as the perfect primer to the world of WARHAMMER 40,000 for those new to the universe. See the Ultramarines in glorious combat, the strife between the worlds of the Imperium, and witness the larger than life characters who preside over it all! This is but the first foray into the larger darkness that is to come from Warhammer and Marvel Comics. Be prepared.

DESCENT INTO CHAOS!

The untold origin of MARNEUS CALGAR continues as a startling discovery is made on the moon of NOVA THULIUM! But will the young Marneus face his first triumphor a soul-shattering loss? A shocking revelation in the history of the legendary Chapter Master of the Ultramarines that will forever change what you thought you knew!

BLOODSHED ON NOVA THULIUM!

The young TACITAN takes drastic action as the secret hidden on Nova Thulium's moon comes to light! In the 41st millennium, heretics invade the homeworld of MARNEUS CALGAR and only he and his ULTRAMARINES can stop them! But will Calgar's perilous battle plan save the Imperium or doom it to the corruption of chaos?

THE MAKING OF A SPACE MARINE!

Young MARNEUS CALGAR has passed his Space Marine Aspirant testing...but that means the real trial is only just beginning! As Marneus undergoes the rigorous training, excruciating organ implantation and strenuous physical augmentation, he will have to prove that, against all odds, he has what it takes! And in the 41st Millennium, the assault on CALGAR ESTATES reaches a deadly climax!

CALGAR'S ULTIMATE TEST!

MARNEUS CALGAR'S deadly gambit brings him back to the moon where it all began and an enemy who has been in hiding for centuries! To quell the threat of this darkest power, Calgar will show no mercy. There. Is. Only. WAR.