From Halopedia, the Halo wiki
The Hydra system is a UNSC-controlled star system located in the constellation Hydra. It is a near-lawless system, frequently embroiled in pirate activity and many insurrections, which the UNSC were not afraid to use nuclear weapons to put down. It was also the site of the Hydra System Massacres, several events that have occurred periodically throughout the history of the system's human occupation.
List of appearances
- Halo: The Fall of Reach (Mentioned only)
- ^ a b Halo Encyclopedia (2009 edition), page 300 (2011 edition)
- ^ Halo: The Fall of Reach, pages 20-21