I may be wrong about that but I've always been puzzled by the way the turn based part of the game works. Say you attack a province. After you've placed your attacking army on the province and end your turn, the enemy has the ability to move troops in and out of the province (like if it was weakly defended, it can move troops from another province over to match your forces). What I don't get is the human player doesn't seem to have this option. Once an enemy moves their piece onto my province, the only way for me to bring reinforcements is if my troops retreat to the castle. Perhaps this is the only way possible with a turn-based game but it seems the human is at a huge disadvantage here.