It's Ken Burns' "The Civil War," winner of numerous awards (including several Emmys), and a true genre game-changer, both in terms of its popularity and its style. (The "Ken Burns Effect" has its own Wikipedia page, for goodness' sake. And the music's not too bad, either.)
It's streaming on NETFLIX INSTANT:
Ken Burns's documentary depicts the action of famous Civil War battles, and relates the stories of soldiers, generals and a beleaguered president.