What does the different game difficulty seetings affect? I.e. when you set the game difficulty to a higher level what becomes harder? Do your revolt chances increase? Does the money you generate become less? Omen succes chance? Size of barbarian hordes? Statistics of your characters? Sizes of foriegn armies? Attrition rates? Agression, tactics, and intelligence of foriegn AI controled nations? The manual does not say anything.