> expecting to not have to vacate at the end of the term

Perhaps that's exactly where the need is foreseen? Such a takeover would assuredly lead to a bout of violent conflict, that very well could lead to all out civil war if not managed well. You wouldn't need the kind of manufacturing required to take on the world, but you'd need a little bit to keep the people at bay. Americans with manufacturing facilities might not be so friendly after that kind of stunt, but if you can make new friends from abroad with facilities on US soil...