Skirmish over Threshold

Upon arriving near Threshold, the was boarded and attacked by the Covenant. The ship launched at leased 7 Longsword-class interceptors before being attacked. The Ship crash-landed on Installation 04 and the survivors began to form an effective resistance.

When the Flood was released on September 20th, they captured a DX-class Dropship and used it to hijack a Covenant vessel. The two events caused the Covenant to begin evacuation of the surface. However, the ships tasked with the evacuation became infested and the Flood spread further.

By the morning of the 22nd, the majority of the ships abandoned the ring, evident in so few remaining in the system. One of these ships included Supreme Commander Thel 'Vadamee.

The remaining seven ships under the command of the Ascendant Justice kept on searching the area, this may have been to monitor for any Flood activity.

John-117 and several other UNSC personnel escaped before the destruction of Installation 04, where they managed to hijack the Ascendant Justice. Two of the six CCS-class Battlecruisers were destroyed as the ship made it's escape.

With Halo destroyed and the Covenant unable to persue their goal, it is counted as a UNSC victory.