Other mistake: When Corporal Harland asked John how to become a spartan, John had thought that they had been picked twenty five years ago. They had been picked thirty five years ago; not twenty five. Dr. Halsey also says twenty five years ago in the book. The Spartans had been chosen in 2517 and it was 2552.
Other mistake: On page 117 of "the fall of reach", The Unrelenting is described as traveling st 100,000,000 km/h. It is highly unlikely given the generally accepted canon capabilities of EVA thrusters and pelican drop ships that Blue team could have matched intercept speed with this cruiser from a planet to orbit burn in a standard dropship.
