There's something I don't understand about this book... The Halo and Halo 2 plots take place 30 years after first contact and defeat of Harvest. If Johnson was at Harvest as a Staff Sargeant, why is he a Sargeant in Halo? And if he's been in for 30 years (heck, even 20!) then why is he still a Sargeant (or Staff Sargeant)? This man should be a Master Gunnery Sargeant or Sargeant Major at that point, assuming he isn't discharged for so much time in service with such a low rank comparatively. in other words, 'wtf?!' by the way, I know today's junior Marines have it a little easier and more laid back than our hardened superiors, but I didn't think that trend would continue to the point we're calling them Sarge. What a shame...