I think it means that he went cause he wanted to, not cause the government sent him there.
However, I also feel its a SLAP IN THE FACE to any US soldier who fought in the Vietnam War.
Ya know, I'll go a long way out of my way for a piece of tail, but..
That would be like saying I fell in love with this Iraqi girl and followed her there. That's just plain retarded.
Anyone who would do something along those lines clearly has issues.