QUOTE : If I know that my troops are capable of striking the enemy, but do not know that he is invulnerable to attack, my chance of victory is but half. <br /><br />If I know that the enemy is vulnerable to attack, but do not know that my troops are incapable of striking him, my chance of victory is but half. <br /><br />If I know that the enemy can be attacked and that my troops are capable of attacking him, but do not realize that because of the conformation of the ground I should not attack, my chance of victory is but half.