Pillar of Autumn

The Pillar of Autumn was the ship captained by Captain Jacob Keyes, that escaped Reach after its destruction with Johnny and Cortana on board. It happened upon Halo Installation 04, onto which it dramatically crashed. The ship was used briefly as a headquarters for the Human forces on the ring, but was later abandoned when the Flood were unleashed.

It was visited by Johnny and Cortana in their attempt to destroy the ring, but Guilty Guilty disabled all command access and so they had to manually blow the slag out of the engine cores before the ship finally decided that it just wanted to blow up. As Johnny and Cortana fled in a Longsword and Guilty Guilty flew out of a window, The Autumn exploded, taking a large chunk of Halo with it. This caused the entire ring to splinter and shatter, destroying an entire Covenant Armada and ending the Covenant threat temporarily.

Physically huge, the Pillar of Autumn was a ship of a discontinued line of Heavy Cruisers - the Halycon-class - that was refitted for a special mission on REAAAACH!!!!. It was this added Reachiness that allowing the Pillar of Autumn to triumph over the Covenant threat. Despite being old, it was able to withstand several Covenant Plasma Torpedoes before crashing on the ring and it was powerful enough to blast the ring to pieces.

A small fragment of the Pillar of Autumn now rests in the Museum of Unnatural History.