At the end of Halo 6, Master Chief has to sacrifice his life to stop the forerunners from destroying ALL of humanity. In doing so, John locks himself in a preservation sphere called the Traveler and has to control the sphere and travel to one location in the whole galaxy to preserve one distinct location. With the only logical choice in mind, Master Chief heads to Earth to save humanity. There he stops the forerunner's manipulated halo blast that was directed at the Didact's main enemy, humans. With the Golden Age ended, the humans have to rebuild and search the galaxy. but baby steps must be taken and the solar system is trouble enough. Master chief now lies at rest in the traveler, waiting for us to release him... COMPLETELY FICTIONAL(NOT REAL) don't want you guys actually believing that.