343 Industries are likely to plan on fixing the Halo Infinites battle pass already - Game News 24
During the events of Halo Reach, we see Halo Killers from the PS3 spin off, HAZE. But the UNSC didn't discover the Halo Rings until Halo Combat Evovled, yet Mantel still deployed
Halo Reach Walkthrough Gameplay Part 1 - No Commentary (PS3/Xbox360) - YouTube