Following the surrender of the San'Shyuum in the Human-Forerunner war, Janjur Qom and another San'Shyuum inhabited world in its system were placed under a Quarantine Shield, monitored by the Forerunner warship Deep Reverence under the command of the Confirmer, a Forerunner Warrior-Servant that fought side by side with the Didact during many battles in their lifetimes. The San'Shyuum were not allowed to leave the system, but were permitted to travel between Janjur Qom and their other world.