Battle for the Truth and Reconciliation

This skirmish on Installaton 04 in September 2552 involved multiple marines and Spartan 117 and Cortana, a UNSC AI.

Raid
After word got out of Captain Keyes' capture by Covenant forces and being held onboard the cruiser Truth and Reconciliation, a rescue plan was needed urgently.

Major Antonio Silva planned out the mission and sent in over a dozen ODSTs in Pelican Echo 419, along with Master Chief Petty Officer John-117, a SPARTAN-II.

The Master Chief and the ODSTs were dispatched in the area surrounding the Covenant CCS-Class Battlecruiser. Using both his S2 AM Sniper Rifle and MA5B Assault Rifle, the Chief fought his way to the ship's Gravity Lift loading zone, where the ship discharged multiple waves of troops and a pair of Mgalekgolo.

Once inside, the marines were ambushed by sword-wielding stealth Sangheili and other Covenant. This is odd, as just a few seconds before this happened, Cortana had stated that she detected no Covenant forces within the ship. This might be because the Elites that initially ambushed them were in Active Camoflauge. This is unlikely because there were many Covenant forces later found on board the ship. After fighting through a storage depot and a large hangar, the marines made it through to the ship's command center, where they killed the Ship Master and many other troops. While the Chief rescued Keyes and three marines, the marines, holding position in the control center, were attacked by two more Sangheili. They then fought their way back to the hangar, where Keyes hijacked a Covenant Dropship and flew it out of the hangar, killing two Hunters in the process.