The Cambodians were even happier when the US dropped more ordinance(specifically cluster munitions) on their country than was dropped by the allies on Japan during WWII.

Unexploded ordinance dropped by the US on Cambodia and Laos has rendered large swaths of land unproductive, and still leads to hundreds of deaths and injuries every year to this very day. Cambodia has an entire cottage industry devoted to recycling and neutralising American bombs.

https://en.wikipedia.org/wiki/Operation_Freedom_Deal

https://en.wikipedia.org/wiki/Operation_Menu#Aftermath

https://en.wikipedia.org/wiki/Land_mines_in_Cambodia