Academy at Mare Nubium

Academy at Mare Nubium, more commonly known as Luna OCS Academy, is a United Nations Space Command Officer Candidate School training institution situated on Luna. The academy is the Sol system's oldest UNSC candidate school. It was located in the County of Newton in the State of Mare Nubium. The Academy itself was connected to a civilian settlement known as Asimov Center via a series of tunnels and surface tubes. These tubes would often need to be guarded against civilian incursions onto academy grounds, and vice versa. The Board of Inquiry was an investigation panel at the school, consisting of officers of the UNSC Judge Advocate General's Corps. The Rutherford Science Magistrate is a school of science at the OCS.

In 2492, a scandal at the academy occurred involving the overnight disappearances of Inna Volkov, the daughter of Admiral Konrad Volkov, from officers' family quarters on base and sightings of her in the company of a young man, which eventually culminated to the impregnation of Inna. In response, six OCS cadets were brought before the school's Board of Inquiry to testify, including Preston Cole. Though Cole was not found guilty of any wrongdoing, he married Inna two months later to end the incident.

Jacob Keyes taught at the OCS academy as a navigation teacher, until his moving to command of a UNSC frigate. In 2541, Miranda Keyes became the second-youngest student, at age sixteen, to be accepted into the academy's pre-enlistment training.

Known graduates

• Dominique
• Miranda Keyes
• William Lovell
• Preston Cole

List of appearances

• Halo: The Fall of Reach (First mentioned)
• Halo: The Cole Protocol (First appearance)
• Halo: Evolutions - Essential Tales of the Halo Universe
  • The Impossible Life and the Possible Death of Preston J. Cole
• Halo: Reach
  • Dr. Halsey's personal journal (Mentioned only)