Meridian

Meridian is a human colony world and a natural satellite of a gas giant in the Hestian system. The city of Angoulême was located on the moon. A high concentration of Forerunner artifacts exists on Meridian; their presence is known to the Office of Naval Intelligence.

The moon held a temperate climate and fertile land. Prior to its glassing, Meridian had an impressive population and robust economy; mining was a known industry on the colony.

History
ONI Section Three had facilities on the moon, to which several SPARTAN-II augmentation chemical precursors were sent without Dr. Catherine Halsey's consent, likely in order to be researched for Project CHRYSANTHEMUM. Meridian was home to many Chalybs Defense Solutions facilities before they were abandoned sometime after the Fall of Reach. The moon was attacked sometime during the Human-Covenant War by the Covenant, though the UNSC successfully fended them off. The Covenant later returned to Meridian and glassed the moon in 2551.

During the battle a small Covenant team discovered a Luminary, which they delivered to the Prophet of Regret. The Luminary would later reveal the locations of the Halo rings, the Ark, and a slipspace portal to the Ark found on Earth.

Sometime after the end of the Human-Covenant War, Meridian was apparently resettled by the UNSC, once again hosting large human settlements by the year 2558.

On October 27, 2558, at 08:33 local time, followers of the religion Triad posted several three-second clips from the helmet recorders of several soldiers on Meridian during an unknown hostile event. At the same day, the rogue Blue Team arrived at the planet and Spartan-II John-117 was spotted. After the event, the UNSC secured the planet and ONI falsely reported Master Chief as killed in action across human-controlled space.

List of appearances

 * Halo: Reach
 * Dr. Halsey's personal journal
 * Halo 2: Anniversary
 * Terminals
 * Hunt the Truth
 * A Hero Falls
 * The Hunt Begins
 * A Hero Falls
 * Halo 5: Guardians