Watching this movie right now - starring a young Chris Cooper and a younger James Earl Jones. About the coal industry in West Virginia in the 1920's. Very violent stuff, very scary.
Here's the IMDB profile on the film: http://www.imdb.com/title/tt0093509/.
Here's a clip from youTube.
It's surprisingly pro-union. It makes me wonder: would a movie like this be made today? Would John Sayles be able to get a big corporate movie studio to put this out?