The first year of training for Spartan III Alpha Company (The children for the project were brought to Onyx on December 27 of the previous year to determine who stayed).

A transmission (possibly sent by Chief Petty Officer Mendez) was sent to Reach Military Complex in 2532. It reads:

///AUTOMATED REROUT UNSC SHIP REG-96667
ABY/// FILE ACCESS GRANTED///WORM-PROTOCOL FIREWALL
ENABLED/FILE ERASED///
PLNB TRANSMISSION XX08R-XX
ENCRYPTION CODE: GAMMA
PUBLIC KEY: N/A
FROM: CODE NAME COALMINER
TO: CODE NAME SURGEON
SUBJECT: PROGRESS REPORT/OPERATION HYPODERMIC
CLASSIFICATION: EYES ONLY, CODE-WORD [BLANK]
TOP SECRET (SECTION THREE X-RAY DIRECTIVE)
/FILE EXTRACTION-RECONSTITUTION COMPLETE/
/FILE START/
INSTITUTIONAL RECORD ALTERED AS PER INSTRUCTION. INITIAL CONTACT WITH BASE AI MADE. HELPFUL, BUT I DON'T TRUST IT. PACKAGES DELIVERED. SELECTION PROCESS STARTED. OPERATION UNDERWAY AND ON SCHEDULE. CANDIDATES EXHIBIT MARKED AGGRESSION WELL OUT OF BOUNDS OF THE SMITH-KENSINGTON INDEX. AS MUCH WORK TRAINING THEM AS IT IS KEEPING THEM FROM MURDERING EACH OTHER. THEY'RE REAL HELL-CATS. LIEUTENANT CLAIMS ALL UNDER CONTROL. HE HAS A PLAN FOR EVERYTHING. UNSURE WHERE HE'S GETTING THIS CONFIDENCE, BUT I DO BELIEVE HE KNOWS WHAT HE'S DOING. ARE YOU SURPRISED? /END FILE/
/SCRAMBLE-DESTRUCTION PROCESS ENABLE/
PRESS ENTER TO CONTINUE.[1]

Sources