The Angel's Storm

The Angel's Storm is the name of the period in the history of the Storm Angels Chapter that occurred towards the end of the Indomitus Crusade.

Background
Led by Akodu, the Storm Angels' 3rd Company managed to finally reach the Indomitus Crusade ten years before its end. The coming of the Storm Angels, from so far away, is heralded as a good omen, for to see warriors of the Imperium emerge from the darkness, from as far away as the Ghoul Stars, bolstered the moral of the troops. Akodu and his warriors were themselves owed by the Primaris Astartes and their abilities. Fighting shoulder to shoulder with them, the 3rd Company suffered far fewer losses then they ever expected.

The behavior of the Storm Angels was quickly considered as distasteful by their allies, for they refused to change their ways. However, even Guilliman admitted that their prowess more than made up for their shortcomings, and their love for the Imperial citizenry was real. During those fifteen years, the Angels fought valiantly, used mostly as support troops to the Unnumbered Sons, unleashed on foes already weakened so that their fury might achieve higher results. Many a Battle-Brother was incensed by such use of their forces, but their officers managed to calm them down.

At the end of this era, Guilliman offered to reinforce the Storm Angels with Primaris displaying the same kind of behavior, hailing from the lineage of Sanguinius. To his surprise, the Astartes from Ionnacaira politely refused the Primarch's generous gift, explaining that they took great pride in being so removed from the Blood Angels Legion of old, as a fourth generation Chapter. Surprised by this belief, Guilliman reluctantly offered them the knowledge to create Primaris from existing Astartes, giving this secret to the few Sanguinary Priests present with the Storm Angels. As the Strom Angels left the Indomitus Crusade after the Battle of Raukos, they brought with them the future of their Chapter with them.