Dunkirk

I went to see the movie Dunkirk http://www.imdb.com/title/tt5013056/ today. This is a part of World War II history, that I only know a little about.  It is time for me to read more about it. The movie was good, lots of action and violence, which is to be expected in a war movie.  I wish they had explained more about the history.  It touched on what was done, and used captions, but I think a few more captions would have helped people who nothing about the story to have a better understanding of what was happening.