From Halopedia, the Halo wiki
At least 7
The Erebus system is a UNSC-controlled star system, and home to the colony world of Erebus VII. Erebus VII was home to a UNSC research facility that was abandoned at some point under unclear circumstances.
Erebus was used in Greek mythology to refer to a region of the Underworld.
List of appearances
- Halo 4, multiplayer map Abandon