BAND OF BROTHER'S
This movie is actually a 10 part HBO miniseries that is based on the true story of Easy Company. A company of paratroopers during World War II. The storyline follows Company E, as it is known, from it's formation until the end of the war.
Donnie plays Captain Lipton in this film. I don't know if the movie follows the book, however if it does then Captain Lipton is a leader among the men of Company E.
For more information about this film, click here and it will take you to a very well maintained site that is updated often. I visit this site regularly to keep up on what is going on with this film.