Anticipating WOR i've been watching stuff set in and around that Era, some good, some bad (and some really bad) but this series really stood out:
http://www.amazon.co.uk/Episode-2/dp...&keywords=1864
http://www.amazon.co.uk/1864-Battle-...&keywords=1864
(There are two versions, the actual Mini-series and a condensed 2hr Film version)
I watched it on a whim not expecting a great deal and I was genuinely surprised how much I enjoyed it, definitely worth watching. It's set during the Second Schleswig War between Denmark and Prussia
https://en.wikipedia.org/wiki/Second_Schleswig_War
Well acted, interesting and has some great Battle scenes in it.