Next came two of Umbrella's highest-tier combat forces: the USS and the Ghost Agents.
As more and more psychics were discovered, and because the earliest USS personnel had grown older and suffered injuries of varying severity, the company decided to discontinue the development of the USS branch, retaining only the Ghost Agents as its black-ops force.
The USS personnel were assigned to various bases as chief instructors for new recruits. Their salaries and benefits were actually better than what they had received while serving on the front lines.
Most USS personnel with extensive combat and containment experience were assigned to Minos Island, where they followed the commands of Colonels Hunk and Kent and trained the Ghost Agents' candidates.
Three thousand sets of Biochemical Power Armor equipped with AT Energy Shield systems, Optical Camouflage, and T-Serum injection effects were inherited by the Ghost Agents.
The company also specially developed various cold weapons, such as Psionic Swords and Psionic Daggers, which could store and materialize psychic energy, allowing the Ghost Agents to make better use of their powers.
For example, when a Ghost Agent with Psionic Level 5 wielded a Psionic Sword, they could compress their psychic energy into the sword and release a Psionic Blade resembling a blade.
The Psionic Blade's physical damage was like that of a high-energy Particle Beam Weapon, possessing immense heat and cutting power.
At the same time, the Psionic Blade could also damage incorporeal anomalies, such as vengeful spirits, ghosts, and other spiritual anomalies.
By the end of 2023, a total of 1,800 Ghost Agents had graduated from Minos Island.
The Ghost Agents had the same nature as the USS. They directly obeyed the orders of the Umbrella Olympus Board of Directors, and other military commanders had no authority to deploy them for combat without approval.