Intent on selling the virus over to the US Government for a military application, the U.S.S. William Birkin's development of the G-virus, a mutagenic toxin set to replace the t-Virus. Later that year in September, Umbrella became concerned over Dr. They would be reanimated as zombies minutes later. However, the team was attacked by a horde of infected leeches and the two men taken down. At its speed when radioing to Wesker, the train was ten minutes away from the training facility's station. Following Wesker's orders, the two-man team took control of the engine and starting it up again. With both the first and second investigation units compromised by an unexpected t-Virus outbreak, along with the Ecliptic Express, a private intercity train ready to take Umbrella personnel for management training, the U.S.S.' 'Delta Team' was called in to investigate. Albert Wesker, an Umbrella researcher former security officer and current (at the time) police infiltrator, was tasked with the re-opening of the Umbrella Research Center, which had been abandoned since Marcus' death. The next, confirmed, implementation of the U.S.S. Their armament of MP5 submachine-guns was also echoed by later units. While not sporting their later comrades' trademark gas masks, the unit did share similar tactics employed in September 1998, namely the operation in two-man cells. Spencer ordered his colleague's execution. increasingly paranoid over Marcus's research, Oswell E. The first known assignment of the U.S.S., was the order placed for the assassination of Dr.James Marcus. One of the most well known members of the U.S.S. The Rockfort Island Military Training Center, trained recruits to Umbrella's paramilitary taskforces until the island's capitulation in December 1998. were specially trained 'black ops' unit dispatched by Umbrella. As opposed to the UBCS, who were mainly used for 'Cleanup' work, the U.S.S. The Umbrella Security Service (abbreviated 'U.S.S.') was an Umbrella elite special forces taskforce.

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