Raid on the Threshold gas mine

The Battle of the Gas Mine took place during the Ninth Age of Reclamation. It was an attempt by Covenant SpecOps forces, under partial command of The Arbiter, to eliminate the Heretic leader, Sesa 'Refumee. Sentinel forces on the installation apparently sided with the Heretic forces, presumably due to 343 Guilty Spark's presence there. The Flood later joined the battle, possibly due to the carelessness of the Heretics. All Flood and Heretic forces (excluding Guilty Spark) are presumed destroyed, due to the destruction of the installation.