- June: Jacob Keyes graduates UNSC OCS.
- August 17: Dr. Catherine Halsey and Lieutenant Jacob Keyes meet 6-year-old John on Eridanus II. John passes a test conducted by Halsey and is unknowingly accepted into the SPARTAN-II program.
- September 23: Jacob Keyes is promoted to full Lieutenant by Dr. Halsey and is reassigned to the UNSC Magellan.
- Seventy-five children are conscripted into the SPARTAN II program per Naval Code 45812 on Reach.
- September 24: The 6-year-old SPARTAN II trainees awaken for their first day of training. They are led by Chief Petty Officer Franklin Mendez. They are introduced to Déjà.
- September 25: John, Kelly, and Sam become friends.