Intelligence had heard that the Viet Cong were using elephants to bring heavy artilliary over the mountains from Laos. They figured we'd have a slim chance of finding the artilliary and an even slimmer chance in finding the Viet Cong. The next best thing was the elephants. Without them the Viet Cong wouldn't be able to easily move the artilliary. Four elephants were killed on this mission.
The reflections at the base of the mountains in the distance are from a Special Forces airfield.