The Hydra system is a UNSC-controlled star system. It was the site of the Hydra System Massacres, and many insurrections, of which the UNSC were not afraid to use Nuclear Weapons to put down.
Its name may be an reference to the constellation Hydra, possibly located within the constellation. It may also be a reference to the famous Greek sea monster Hydra.
- ↑ Halo: The Fall of Reach, pages 20-21
- ↑ Halo Encyclopedia