WOLVERINE...in all seriousness, as you say this could be BS or Real, I don’t think it will be like Red Dawn, but as series of major terrorist attacks all over country, in an attempt to destabilize the USA and get us tied up trying to put down the attacks while China takes Taiwan or other hot spots like Israel vs Iran start to kick off in a true world war.
Their strongest weapon is the IED. Could be anywhere you would find a car, which is anywhere.