Total Battle is a wargame where player attacks are essential to game mechanics, city development, and general game progression.
Apart from our constant efforts to balance the game and make it a level playing field for every player, specific regulations sometimes are created, edited, and enforced by players themselves. Such regulations are usually called "Rules of Engagement" and are generally in user-created private chat channels.
In order to find out if such rules exist in your Kingdom, you should go ahead and post the relevant question directly to the Kingdom chat.