OPERATION: Sigurd

Now on Ao3 (Archive of Our Own) Now! Under the same name.

(Fan Fiction of Halo by 343 Industries/Microsoft and Resonant Evolution by @JayK_AND)
LEGAL NOTE: This is an unofficial, fan-made work. Not endorsed or created by 343 Industries, Microsoft, Bungie, or JayK. All characters, concepts, and settings belong to their respective owners.
TW: Graphic violence, gore, strong language, war themes.

EARTH WILL NEVER BE THE SAME.

October 2552. Master Chief returns to Earth from the ruins of Installation 04, having stopped the Flood-and barely survived the genocidal Eckzahn Union.
Across the stars, Captain Rhon Andersson, once a respected KDA officer, stands trial before Alþewolf Ivar Eriksson on Leikos. Sentenced to death... or so the High Assembly believes. The execution is a lie. Ivar has other plans for his disgraced captain - a second chance forged in secret.
As Eckzahn fleets descend on humanity's homeworld, both sides converge on a newly discovered ring: Installation 05, better known as Delta Halo. A desperate race begins for the activation Index.
Master Chief must fight through hordes of Eckzahn battalions, uncover the secrets of the rings, and stop the Union from claiming ultimate power. Blending brutal military action, political intrigue, and an artifact-hunting expedition, this is an all-new Halo x Resonant Evolution adventure.
Will humanity hold the line? Find out soon!