Agent Orange is an herbicide and defoliant chemical. It is widely known for its use by the U.S. military as part of its herbicidal warfare program, Operation Ranch Hand during the Vietnam War from 1961 to 1971. In addition to its damaging environmental effects, the chemical has caused major health problems for many individuals who were exposed.
Up to 4 million people in Vietnam were exposed to the defoliant, with around 1 million now suffering serious health issues. The chemical is capable of damaging genes resulting in deformities among offspring of exposed victims. The U.S. government has documented higher cases of leukemia, Hodgkin's lymphoma, as well as other various kinds of cancer in exposed veterans. Agent Orange also caused enormous environmental damage in Vietnam.