When I first saw the movie a few years back, I was glad I found because of the subject matter. But when I saw what a great all-around cast was in it, I started to wonder how it'd slipped through the cracks since its release. I figured it out quick enough, it's an average war movie that's pulled down by a completely unnecessary love story. The story of Reynolds and his Kachin guerillas is the high point of the movie with some impressive action sequences, an ambush on a bigger Japanese force, a surprise attack on the Kachins' Xmas party, and an assault on a heavily guarded Japanese airfield.
Too bad of course the love story was added. It doesn't work for any number of reasons. For one, Sinatra and Lollobrigida had little to no actual chemistry. Two, it takes far too long to develop. The movie opens with an ambush and the aftermath and then spends most of 45 minutes to an hour with Reynolds and his 2nd in command, British officer Danny DeMortimer, back in civilization as Reynolds and Lollobrigida's Carla meet.
Having said all this, I did buy the DVD so there must be something positive, right? Sinatra is pretty good as Reynolds, although he does sport a ridiculous goatee early in the movie. Richard Johnson as DeMortimer has some funny moments and is a great character, a good counter to Reynolds. The whole supporting cast is good, Charles Bronson, Peter Lawford, Dean Jones, Brian Donlevy, Phillip Ahn, and Robert Bray. But most of them aren't given much to do because so much of the story's focus is away from the OSS volunteers and the Kachins.
So overall, an average movie that could have been better, but it's a guilty pleasure for me. Worth checking out, but don't expect a classic.