The movie doesn't really start until about an hour in
I started watching it, and was getting bored after about 10 minutes, so skipped to about an hour in, and then found it to be rather great.
Seemed to be far too much needless guff in that first hour to me (I stopped a couple of times)...just basic war stuff, and jealousy building between two blokes.
I guess the bit to start from is when The bad guy and the woman first meet, in chapter 2, which is about an hour in.