The Umbrella Biohazard Countermeasure Service, or U.B.C.S. for short is composed entirely of ruffians and scoundrels who used to be in their countries' militaries. They exist primarily to control the disasters caused by Umbrella's products and are first on the scene of any toxic incident. Because of the dangerous nature of this work, many of the members of this group are there only because they will be granted a full pardon for any crimes they've committed, or refuge from the countries they ran away from. Many of the team members come from countries that became communist after their national policy was destroyed and have a deep military background that is put to good use in rescue operations. But for the Raccoon City disaster, none of the four squads' 120 members were put to use saving people.

Umbrella's directive was the gathering of B.O.W. data in the largest civilized disaster area in history and their official objective of saving people was merely a feint. The U.B.C.S. was thought to be the perfect guinea pig with which to gather data on the B.O.W.s and second-handedly infected irregular mutants they would be fighting. Under this heartless plan, almost all the members of the U.B.C.S. from Alpha Team to Delta Team, were completely wiped out. Eventually, only Carlos Oliveira from Delta Team A Squad escaped the monsters' clutches, with the help of former S.T.A.R.S. member Jill Valentine.

The Ones Who Sold Out Their Teammates For Personal Gain

Underneath the U.B.C.S. plan to rescue human survivors lay the nefarious intentions of its members who were acting as observers, or spies, for Umbrella. These observers included Delta Team B Squad leader Nicholai Ginovaef and Tyrell Patrick, the leader of Bravo Team A Squad. These observers were under special orders to observe their teammates fighting monsters, collect battle data, recover samples from the various Umbrella laboratories and destroy any evidence linking Umbrella to the disaster. It was, of course, vastly important that their true purpose remained secret. This led to Nicholai and the others using their teammates as disposable pawns and many of them were cruelly sacrificed.

Before the "rescue" mission, the observers were injected with a higher-quality vaccine than their teammates, given special instructions on little-known escape routes and provided with reliable methods of contacting outside agents to report their progress and be rescued if necessary. To that end, they were able to go about their observing duties calmly and coldly. If this had been someone with the character, like Mikhail Victor, it doubtlessly would not have gone so smoothly. As far as Umbrella were concerned, it was easier to control those with a selfish desire for money who would be willing to sell out their teammates, rather than those with a strong sense of justice and morals. Nicholai in particular was an excellent fit, with his cold, ruthless demeanor.