The United States Air Force (USAF) is the aerial service branch of the United States Armed Forces and one of the American uniformed services.
Chris Redfield served in the USAF, in the same unit as Barry Burton, whom he became friends with. He was trained in a wide array of weaponry and hand-to-hand and knife combat. He also qualified to fly fixed-wing aircraft and showed experience in VTOL. Chris often found himself at odds with his superiors, and was retired from the force as a result. Barry put his extensive knowledge of firearms to good use when he finally joined S.T.A.R.S., the R.P.D.'s special force team. Chris soon followed Barry into S.T.A.R.S. after leaving the Air Force.
During the Raccoon City Destruction Incident and the Tall Oaks Outbreak, the Air Force conducted sterilization operations by bombing both cities.