Agent Orange was a herbicide used by the United States military during the Vietnam War from 1962 to 1971. Its primary purpose was to eliminate trees, plants, and vegetation around U.S. bases. The aim was also to clear foliage that provided cover for enemy forces, as noted by the Cleveland Clinic. 

Over this period, approximately 11 million gallons of Agent Orange were sprayed over 20 million acres in Vietnam. The U.S. government banned the use and production of Agent Orange in 1971, following growing evidence of its harmful effects. The herbicide contained dioxin, a toxic compound linked to severe health issues. These include birth defects and cancers, affecting both Vietnamese civilians and American veterans.