Imperian has hundreds of help files to help you learn more about the game and how to play.
By typing ENEMY <player>, you will add someone to your official list of enemies. ENEMIES will list your enemies, and UNENEMY <player> will remove someone from the list. You can have, at most, 20 officially declared enemies. If you wish to unenemy all your enemies at once, simply do UNENEMY ALL. The significance of your enemies list lies in the way various abilities work, and in the way mobiles that are loyal to you treat those on your enemies list. We will leave it up to you to discern exactly how this works. See also: HELP ALLIES