The Umbrella Special Forces is a file that can be found in Resident Evil: The Umbrella Chronicles.
The elite special forces unit owned and operated by Umbrella. They report directly to the highest-ranking officers in Umbrella. Unlike the U.B.C.S. which is another of Umbrella's special forces that performs more visible missions such as rescuing civilians, this unit maintains total secrecy and a small size.
Delta Team was sent in to blow up the Ecliptic Express after the trouble occurred, but they were overwhelmed by the leeches and wiped out. One of the unit's more notable members, HUNK, belongs to the Alpha Team and carried out the impossible mission of retrieving the G-virus from the research facility under Raccoon City.