The Rubicon was deployed from Luna after a scouting party had received pings from Forerunner ruins. The Rubicon was carrying ONI scientist teams and remote contact teams. Installation 00 was in a very bad shape from damage dealt to the Ark's life support. RCTs were sent to search for the source of the signal. All but one RCT, RCT-06, returned with heavy damage. It returned with 343 Guilty Spark, who was the source of the beacon.