@ Carl: I really don't think it simulates them battling it out, I think it's more a tabletop or RPG sort of rough math. Because, when you look at the casualties afterward, there isn't rhyme or reason to them. Afterward it almost looks like someone rolled a dice about which units took casualties. They usually are almost evenly distributed across units. Artillery is notorious for taking small numbers of casualties. Why is that? When battles are fought out, artillery surviving is usually almost an all or nothing thing... not a quarter or half the unit. The way artillery takes losses has always made me think its a rough math on the stats that's used.