one less covie to worry about
Reach High Command is mentioned in passing as being a target of high value, as well as eventually falling by the time Fred and the others fell back to Menachite. Knowing that, I didn't think it was too much of a stretch to imagine the UNSC trying to defend HighCom with such a battle as pictured here, basically just a splinter of the overall battle that was occurring across the planet at the time.
Also, the Pillar of Autumn was a Halcyon-class cruiser, and even that had massive boosters to allow it to maneuver in-atmo.
that AND a SHIVA...
You shall not be forgotten!
This is fantastic.