Seems the Athenians are winning a lot amongst the veterans. Did not notice any play balance problems with my limited experience. Hope this helps. Memory is starting to fade on this one. I thought it was a lot of fun however.
Units are cavalry, hoplites, and triremes.
One ship unit can transport one cavalry or hoplite unit. Since the turns are three years long each, movement is unrestricted in distance. You pay to activate and replace units, and collect money from your empire, with bonuses for particular conditions. You lose income for having locations in rebellion or ravaged by the enemy. If your Bellicosity gets too low, your people become unwilling to fight.