Leaders are rated for aggression, inspiration, initiative and combat ability.
Some values change as leaders gain experience, others are fixed parts of their personality.
Can be played hotseat or e-mail among two humans. AI is not very good. I recommend the human player takes the Union, as the computer is better looking after the strategic defense. Be sure to choose a mild or large advantage for the computer player on the setup screen. I dislike having to set objectives for my armies, then having to order the subordinate divisions and corps to the same location myself.