That would be great if you were taking your army (leaving your territory vulnerable but yet knowing that you have allies in your area) and invading an enemy location and then all of a sudden you get notified that one of your allies has attacked you due to something you may have done in the past that your ally has now decided to takes action for. Or maybe an AI system where it can possibly change based on how strong your army us, how wealthy you are, how loyal you are, and if any of those settings change on your end creates a higher chance of losing an ally? That would make it interesting and challenging so basically you think you have an ally but when your at your weakest you will know who your true allies are?
