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UC-123 aircraft on Operation Ranch Hand spray mission   (USAF photo) "The term Operation Ranch Hand was the military code name for the spraying of herbicides from U.S. Air Force aircraft in Southeast Asia from 1962 through 1971." "Between 1962 and 1971, Ranch Hand sprayed about 19 million gallons of herbicide, 11 million of which consisted of Agent Orange.   The spray fell mostly on the forest of South Vietnam, but some was used in Laos, and some killed crops to derive Vietcong and North Vietnamese troops of food.   The military purpose for using herbicides on noncropland was to remove the vegetation cover used by Vietcong and North Vietnamese forces for concealment." "Operation Ranch Hand: Herbicides in SEA" William A. Buckingham, Jr. Air University Review, July-August 1983 Ranch Hand and Agent Orange Resources UC-123K Provider Aircraft National Museum of the US Air Force The Air Force and Herbicides in Southeast Asia 1961-1971   (e-book) William A. Buckingham, Jr. Washington, DC: Office of Air Force History, 1982 "Ranch Hand: Defoliant Operations in Southeast Asia"   (unit history) Air Commando Association The History of Agent Orange Use in Vietnam Herbicidal Warfare in Vietnam, 1961-1971 Operation Flyswatter: Insect Spay Missions in Vietnam These missions by single un-camauflaged UC-123 aircraft over friendly bases were often confused with herbicide spraying. Veterans and Agent Orange: Health Effects of Herbicides Used in Vietnam   (e-book) Committee to Review the Health Effects in Vietnam Veterans of Exposure to Herbicides Washington, DC: National Academy Press, 1994 USAF Agent Orange Health Study Statistics on Agent Orange Use • By Location Map of Spray Missions in South Vietnam, 1965-71 Click on map or title above for larger image. Map courtesy of the Hatfield Coinsulting, Ltd. Gathering the Data For These Maps (pdf) Map of Spray Missions in the A Shau Valley * Click on map or title above for larger image. * Now called A Luoi Valley   -   Map courtesy of the Hatfield Consulting Ltd. Animated Map of Spray Operations in VIetnam, 1963-1970 • View With Apple QuickTime      • View With Windows Media Player Efforts to Mitigate Impact of Agent Orange in Vietnam (Hatfield Group) Overview of Preliminary Results (1998, cached) Overview of Mitigation Strategies (2000, cached) Agent Orange & Mitigation Efforts in Vietnam Return to Top