Phobos

Phobos is one of Mars's two moons.

History
At some point, the Cabal somehow managed to alter its orbit.

Sometime after Skolas' capture by Guardians, the Vanguard intercepted a Cabal distress signal from Phobos. Guardians were sent to investigate.

Regions

 * Fleetbase Korus - A Cabal military base and mining facility.
 * Firebase Thuria