From Halopedia, the Halo wiki
The Threshold Array is presumably a UNSC station or system of stations that was established in the orbit of the planet Threshold in the Soell system after the Human-Covenant War. Its purpose likely was to monitor the many Forerunner installations near Threshold and to help enforce the exclusion zone surrounding the former site of Installation 04, probably exercising a role similar to that of Ivanoff Station and Lisbon Station. In 2558, the array's Station AI, Kue Ching, defected from the UNSC and declared its alligance to Cortana's Created.
List of appearances
- Halo 5: Guardians (First mentioned)
- ^ Halo 5: Guardians, campaign level, Guardians