- Dr. Halsey, while still interred within Ivanoff Research Station, analyzes the Composer found on Installation 03. She manages to develop an extremely accurate theory as to its purpose based on its similarity to the UNSC A.I. Matrix Compiler which she developed.
- The M12B Force Application Vehicle variant of the UNSC Warthog begins production.
- The Budgetary Retention Hearings take place.
- An attempt by the United Rebel Front to take over Draco III takes place.
- A skirmish between the UNSC Sagan Blue and the Kig-Yar pirate ships Mark of Prophecy and Divine Breath takes place near New Carthage.
- A recolonization team returns to Alluvion. There, they discover Forerunner pylons opening up a section of the Sundark Sea.