I am looking for a name of a movie that takes place in Vietnam or is related to Vietnam War (a movie describing someone's memories from the Vietnam War). I remember that the plot was focused on a man who fought in the War. He was desperate, saying he'll "take a walk on train tracks", as a metaphor for commiting suicide.
I remember the movie from my childhood and I'm looking for the title. I believe it might have been shot in the 80s or 90s (definitely no later than 1999).