If you're interested in the french revolution and the time after it, I recommend especially these 2 movies
La révolution française - Two parts of it: 1. Les Annés lumières / 2. Les Annés terribles, A movie about the the years between 1789-1794, all events between 1789-1792 and the terror regime of 1792-1794 are described detailed and very authentic
Just a clip with different scenes because trailers sucked back then
If you want to see a very realistic and profound film about the battle of waterloo I recommend this one
Especially watch this clip to get an impression of the enorm expense in realistic troops sizes, definitely worth of watching.