From Halopedia, the Halo wiki
New Blood was the report code name for a report filed by Spartan Edward Buck before October 2558. It contained a first person report by Edward Buck on his career, his team Alpha-Nine, Alpha-Nine becoming Spartan-IVs, and their eventual break-up.
This report is used as the fictional framing device for Halo: New Blood, but went unnamed until Halo: Bad Blood, where the name "New Blood" was used to showcase that the story of Alpha-Nine breaking up was already told in Halo: New Blood.
List of appearances