Agent Orange
Part of the United States strategy against the Viet Cong and North Vietnamese was to deny them cover and food. Knowing that the area of Vietnam that borders Laos and Cambodia was a key transport route used to move troops and supplies from North Vietnam to the south, the United States planned to defoliate large areas of jungle to hamper these movements.

Insecticide Deceit?
The truth about insecticides used at Nui Dat by John Mordike.

C-123 Toxic Exposure Agent, Orange’s reach beyond the Vietnam War
All but one Federal Agency has confirmed the C-123 veterans’ Agent Orange exposure. Only the Department of Veterans Affairs (US) opposes veterans’ claims, and as a matter of policy but not law or science!