During the Vietnam War, the United States used various herbicides, including Agent Orange. Agent Orange contained dioxin, an extremely toxic substance. Vietnam veterans suffered from ailments, including chloracne, that they attributed to their exposure to these chemicals. Additionally, some veterans had children born with birth defects that they believed were the result of their wartime exposure to pesticides. Veterans of the Vietnam War and their families filed a class-action suit against the United States government and various chemical producers, alleging that exposure to dioxin caused them health problems and caused their children to have birth defects. After five years of litigation, the parties reached a settlement agreement. The settlement agreement had to be approved by the trial court.