A question (out of curiousity) since we're on the subject of Acheron... Usually by the time I get a sufficient number of troops (including at least a couple of beastmasters), I find that one or even two other civilizations has a large number of troops at Acheron's city. In the last game when I took my troops to the city, Faerly must have had close to forty units stationed there. My question is this: Do the AIs know about "courage" (and other) promotions? I've never seen them actually attack the dragon despite the fact that frequently that have a sufficient number of units that they could PROBABLY take the city. I'm guessing this is because they don't have a clue why their troops cannot attacked Acheron... Thanks.