I have read that Napoleon actively used to play strategy games with his generals in order to understand how they act in a range of situations. The generals also learned the same thing about each other. This meant that in a battle situation without communication between the generals, they were able to assume the behavior of the others.
I would like to know which games this was. I know that Napoleon played chess, but I do not believe that this gives much such knowledge because the situation is so domain specific.