In the past, I've always been able to locate lands held by the AI, including their base either by using the track player utility, or it being visible directly from the map. For almost a month, although I've been attacked by the AI "Forces of Terror" on three separate occasions, none of their locations can be viewed even when using the tracking utility.
This means that besides baiting the AI into attacking an isolated level one base with no defenses, it is not possible to engage them and earn peacekeeping points.