Halo Crusade

The Halo Crusade was the largest campaign ever conducted by the mysterious Zero Legion. The name of said crusade was to the Halo Zone, the region beyond the Astronomican, as the crusade was focused on worlds near the edge of the Halo Zone. The purpose of the crusade was to retake various STCs and other ancient human technology either from the Dark Age of Technology or the Horus Heresy. These worlds had been untouched by the Macharian Crusade. The campaign saw the Zero Legion and the Adeptus Mechanicus battling against various forces.