From Halopedia, the Halo wiki
Placement and firing of the rings
Discovery by humanity
The system was discovered as Installation 07's location by renowned human scientist and historian Doctor Luther Mann after a year of sifting through data he'd discovered during his stay at the ONI Research Facility Trevelyan.
During the Created conflict in 2559, the system was the site of a major battle. The Banished, led by War Chief Escharum, invaded the Halo. A battle both in space and on the installation took place, with the UNSC suffering major losses, leaving the installation occupied by the Banished, and badly damaged by a cataclysmic explosion. Following the explosion, Zeta Halo was suddenly relocated from the Esphu system to an unknown location.
List of appearances