Soell

The Soell system, also known as Iota Horologii, was a strategically-important star system of nine planets located in the Enuma Sector of the Orion-Eridanus Supersector.

In the waning years of the Forerunner-Flood War, it was chosen as the site where Halo Installation 04 would be deployed, which was activated with the other Halos to wipe out all sapient life in the Milky Way galaxy. It was discovered by the crew of the in September 2552, who were pursued from Reach by the Fleet of Particular Justice. In the ensuring battle, Alpha Halo was destroyed by John-117.

In the aftermath, the Covenant established a large presence in the system in order to research the various relics that survived the Halo's detonation. The UNSC and the Concord of Reconciliation captured the system some time after the Human-Covenant War, where the two governments considered it a joint-operations area.

Known locations

 * Soell V
 * Threshold
 * Halo Installation 04
 * Basis
 * Keyes Station