Circinius IV

Circinius IV was a Unified Earth Government colony world in the Circinius system. It was the location of the Corbulo Academy of Military Science, an officer training school for the offspring of high-ranking UNSC officials.

The colony and the academy were attacked by the Covenant during the earliest days of the Human-Covenant War on April 26, 2526. During the battle, the Covenant killed almost the entire population of the planet. Only four cadets from Corbulo Academy survived the initial assault, although one of them, Chyler Silva, died during the battle. Later, the planet was glassed by the Covenant.

Trivia
Along with Hat Yai, Circinius IV is not mentioned in the Assembly's report on glassed worlds (dated January 1, 2530) in data pad 14 from Halo: Reach. Thought the obvious Doylist explanation is that the planet was created after the game's release, there is no clear in-universe reason for this omission.

List of appearances

 * Halo 4: Forward Unto Dawn