Just in case no one noticed. Designed not only to deprive guerillas cover, it was also designed to deprive them, and civilians, of food. As well as kill and cripple people.

I'm sorry folks, you simply make fools of yourselves when you try to take the high road. The United States gave that up long, long ago. I truly am sorry - I wish the US could take the high road.

https://en.wikipedia.org/wiki/Agent_Orange
"The government of Vietnam says that 4 million of its citizens were exposed to Agent Orange, and as many as 3 million have suffered illnesses because of it; these figures include the children of people who were exposed.[59] The Red Cross of Vietnam estimates that up to 1 million people are disabled or have health problems due to contaminated Agent Orange.[60] The United States government has challenged these figures as being unreliable.[61]"