Blood and Iron is a modification for Napoleonic wars set mainly between 1870 and 1880. The aim is to give the players a good representation of the era, balanced and fun game-play, immersive maps, and a generally good time. The third update is currently under development, and it will bring you lots of new possibilities and two new factions.
The mod is very well made, with each nation being fun to play, even as the very broken/unfinished 20th century units (its fun to go around as a traditional chinese soldier with nothing more than a bow and arrow and huge sword) and has a good soundtrack that has me singing/humming military marches all the time.