Battle rank is a number that indicates how successful a premium player has been in battle. The higher the number, the more successful in combat (player vs player) and killed without being killed; the lower the number means the player has been defeated more often.
Battle rank starts out at 1000.
Battle rank will only increase when fighting a player from an enemy kingdom. At first it will increase pretty well but as the player reaches higher ranks, battle rank will start to gain only 3 points if an inferior enemy is killed of a lower battle rank. Also if the player is killed by a relatively weak player a lot of battle rank will be lost.