i don't know, this movie isn't that great, but it's quite entertaining in it's own dumb way, and boasts an excellent cast,( Lee Van Cleef, Klaus Kinski, Ernest Borgnine, Mimsy Farmer.) David Warbeck wannabe Lewis Collins stars as a tough commando sent to the golden triangle to wipe out an opium ring. he inlists the help of a war pilot (Van Cleef) and they venture into the jungle and blow lots of stuff up. the plot doesn't make much sense, and the direction isn't nearly as stylish as earlier Margheriti action flicks like The Last Hunter, but it does have lots of patented Margheriti explosions and some good action scenes, as well as the aforementioned cast. there's also a scene where freaky little Luciano Pigozzi gets crucified in his own church