Aerial spraying of herbicides is first tested in the Republic of Vietnam (South Vietnam). It is the beginning of what would become a much larger U.S. effort, code-named Operation Ranch Hand, that would officially start in January 1962. Its aim: to clear away trees and other vegetation that provided cover for North Vietnamese and Viet Cong forces, and to destroy enemy food supplies.
* "Operation Ranch Hand: The Air Force and Herbicides in Southeast Asia, 1961-1971" (Office of Air Force History, 1982): @
* "Ranch Hand" (Air Force magazine, 2000): @
* "The Herbicidal Warfare in Vietnam, 1961-1971" (Agent Orange & Dioxin Committee, Vietnam Veterans of America): @
* "The extent and patterns of usage of Agent Orange and other herbicides in Vietnam" (Nature magazine, 2003): @
* "Characterizing Exposure of Veterans to Agent Orange and Other Herbicides Used in Vietnam: Interim Findings and Recommendations" (Institute of Medicine of the National Academies, 2003): @