- last post: 01.01.0001 12:00 AM PDT
You need to read the rest of the books.
John returns to Reach after the events in Halo CE, and finds that there are some remaining Spartans alive on the planet (which wasn't TOTALLY glassed) along with Halsey. A few other Spartans are actually on Earth fighting the Covenant during the early events of Halo 2 and I'm guessing Halo: ODST, however they are called to the planet Onyx and get trapped in a mini Dyson Sphere at the centre of Onyx, which is called a 'Shield World' by the Forerunners.