The Duellists (Ridley Scott 1977) Harvey Keitel, Keith Caradine. As a bonafide Napoleonic buff & Ridley fan I can't help but love this film. My first cinema experience of Ridley's work too only surpassed by Alien & Bladerunner.
Directed by Ridley Scott. With Keith Carradine, Harvey Keitel, Albert Finney, Edward Fox. A duel between two feuding Napoleonic officers eventually evolves into a decades-long series of duels, after each bout - for various reasons - ends unresolved.
T2: The Duellists - 1977. If you want to see textbook examples of all of the different 'fashionable' styles of dueling during the Napoleonic era, this is your film. It's also the only movie I've watched that seems to recreate authentic combat - a cavalry sabre is a heavy thing and it really takes a physical toll after just a few minutes of adrenaline fueled activity - and there isn't any of the ridiculous swashbuckling flourish you usually see in the movies.