The Umbrella Biohazard Countermeasure Service (U.B.C.S.) was a special forces unit owned by the Umbrella Corporation, specializing in rescue operations during biohazard outbreaks. It was founded by former Soviet Colonel Sergei Vladimir. Although the U.B.C.S. has been very successful in every operation but one, the unit suffers a high mortality rate due to the hazardous nature of their missions. Thus, the U.B.C.S. is comprised almost exclusively of convicted war criminals and mercenaries from around the world who joined the U.B.C.S. as an alternative to capital punishment for any crimes they may have been caught committing. The unit consists of about 120 operatives, divided between four platoons (with two or three squads per platoon).==Involvement in the Raccoon City incident==The U.B.C.S.