While Star Bolt tries to forget his life of sin. An ancient evil sits and waits for the day that its prison will weaken so it can break free and finish its goal that was started 2000 years ago. The extinction of the alicorn race.
ODSTs, the second proudest unit in the UNSC. They volunteered to be shot from space onto the planets below to fight Humanitie' enemies. These soldiers are respected, feared, and avoided by most.