The Umbrella Corporation was a giant conglomerate which operated ruthlessly as a major international player in a number of markets; including pharmaceuticals and medical equipment along with top-secret operations utilizing genetic engineering and biological weaponry. The company also had a more benevolent public face for the ignorant masses, producing cosmetics, consumer products and foods.
A subsidiary of Umbrella operated as a malevolent paramilitary organization. This division of the corporation maintained a highly trained security force capable of rescue, reconnaissance, and paramilitary operations. They used a variety of vehicles, including HUMVEEs. Complementing this security force was an air wing, which maintained a fleet of AV-8B Harrier jump jets, UH-60 Blackhawks, C-130 Hercules water-landing capable cargo planes, CH-53 Sea Stallion cargo helicopters for transporting prisoners and Hughes MH-6 'Little Bird' attack helicopters. The corporation utilized these resources in order to secure and protect its assets, as well as its high profile employees.
Formerly a global pharmaceuticals company, they were conducting virus based experiments into biological weapons in a facility in the Arklay Mountains, just outside Raccoon City. The leak of the virus to the outside caused the now infamous incident involving zombies, the "Mansion Incident". The crisis was resolved by the action of Chris and Jill, and their subsequent pursuit of Umbrella pushed the company into bankruptcy.