The Operational Art of War 3
 

Reviews they have linked up to:

http://jaguarusf.blogspot.com/2006/0...f-war-iii.html
http://www.matrixgames.com/forums/tm.asp?m=1159610

I personally still learn it and already love it, though not being competent at it. However, my only complain so far is the graphics resolution being linked to the desktop screen resolution. at 1280x1024, trying to decypher the microscopic fonts is a pain, but so is to clean up arrangement of desktop symbols when resetting screen resoultion to 1024x780 for playing, and then back to 1280. The game is impre4ssive and very flixible and challenging, but it desperately needs an ingame-screen resolution switch.

If you are a hardcore streategist, check this game out. I learned that it is quite famous amongst hardcore hex-players.