Sierra-One was a Gear squad, lead by Sgt.Bernadette Mataki, that took part in Operation: Hollow Storm. Most of the squad was killed during the Assault on Landown and in the Hollows. Only Sgt.Mataki and Niall Sorrens were able to survive, although Sorrens was subsequently killed in the flooding of Jacinto City. Mataki was able to escape the sinking and was reassigned back to Delta-One.
Operation: Hollow StormEdit
During the Assault on Landown, Sierra-One made it down into the Hollow, but apparently lost contact with Control, as they were thought to be missing in action. They fought their way through the Hollow back to the surface, but were all killed except for Sgt.Bernadette Mataki and Niall Sorrens. However, they missed their rendezvous with a King Raven to evacuate Jacinto, and the city began to flood. The two survivors were separated, with Sorrens assumed to have drowned, but Sgt.Mataki was rescued by KR-239 and Delta-One. Mataki rejoined Delta, and it is unknown if Sierra-One was ever reformed.