From the film it seems that the soldiers who went home have never been able to reintegrate back into Russian culture ---- that they feel as though they have been left hanging in no mans land. Where as most of those who stayed are very happy.
In the days when most of my friends went off traveling the World, after University. I was at home with a tiny babe so couldn't but I promised myself that I would in old age instead, another dream hits the dust --- so many of those I knew and still know where in Afghanistan, I am so sorry we are no longer able to explore that extraordinary country --- and so many many others.