In the wiki page, "War and Peace: Secret Master's Guide to Diplomacy and Imperialism," it states:
I've looked for further information on "border disputes" but don't see it in the manual, strategy guide, wiki, or even in the game files. Was this event removed from the game after this wiki page was written?2. Taking land away from civilized countries is generally very expensive. You should be engineering the possibility of border disputes (very low relations and a common border) in order to generate the needed random events. And when you get them, use them effectively by annexing the right states.