Ingame Friends

Facebook
If you are playing on facecbook your facebook friends will automatically be added as you ingame friends if they play war commander. There is currently no way to remove them from the game while keeping them friends on facebook.

Kixeye
If you are playing on kixeye, you can add someone as your ingame friend by adding him on kixeye. In order to do this
 * Find that person's kixeye profile by writing his/her ingame name in the search bar.
 * Visit his/her profile page.
 * Click "Send Friend Request" button.
 * Wait for them to accept your friend request.

Advantages

 * If someone is added in your friend list, you will receive a notification in real time when he/she is under attack. You may immediately avenge your friend.
 * This tactic can be used in clan wars when an attack on an ally can be immediately avenged.