Reclaimer - H4.png

Ephsu system

From Halopedia, the Halo wiki

Ephsu system
Stellar overview

Orbiting planets:




Ephsu is a star system in the Sagittarius Arm of the Milky Way,[1][2] notable as the location of Installation 07. It is an otherwise unremarkable M-dwarf star system, with one, uninhabited terrestrial planet, which serves as the anchor for the Halo.[2]


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.[3] There was a research outpost on the Halo established by March 2555,[3] which was protected by at least two Halberd-class destroyers.[2]

During the Created conflict in 2559, the system was likely 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.[4]

List of appearances[edit]