in the future there could just be hundreds of drones coveing a “no go zone” and taking out any target in there.
maybe a laser that stuns the person ;)
how deep would this wall have to be to avoid going under it.
they’re doing it too often in Israel.
how about rotating troops on the border to simulate war times conditions a Division at a time or special training center for spec ops..like that is going on in South Korea to go along with your hundreds of drones I would call that a fence too