If I were a nation with a limited ability to directly confront an enemy, but had a basic nuclear capability to include launching a warhead with a missile, or a much better abled antagonist who wants to take the easy route in diminishing an enemy without using all of its own military assets, lofting a nuke to effect an EMP strike would be the way I would go. EMPs and CMEs have been a topic both in prep sites and now in the MSM of late. The point I would present is simply this.... should this ever occur, either man-caused or natural, we will NOT find ourselves back into an Eighteenth Century existence and so many state. We will be back into the Twelfth Century existence... if we are lucky. The Eighteenth Century will look like modern times at that point. We will not have the knowledge, the skills, the tools, the transportation, or the shelters that enabled those in the Eighteenth Century to survive and flourish.