Geheimcode Wildganse (1984)

aka's: Geheimcode Wildgänse/Arcobaleno Selvaggio/Codename: Wild Geese

Commander Robin Wesley (Lewis Collins), leader of a group of mercenaries, goes to the Golden Triangle in Southeast Asia to overthrow a dictator, who is a major manufacturer and dealer of the world's opium. Also stars Lee Van Cleef and Ernest Borgnine. Also with Klaus Kinski and Mimsy Farmer.

This film comes from a very nice widescreen import print.