From who?
If you haven’t been keeping up with current events, we (as in the US foreign policy and military) have been paving the way for the Caliphate for three decades now.
That leaves Russia or China to do the work. Which they won’t till the remains of the US empire are fully taken out.
Somehow, that plot seems familiar, like I’ve read about it somewhere. When the bear sweeps down, any idea where the big final battle may be?