But the Pentagon's new focus on preparing to fight peer militaries such as North Korea, Russia and China changed all that.
An assessment last year estimates that there are about 10,000 large-scale underground military facilities around the world that are intended to serve as subterranean cities, an Army source, who is not cleared to talk to the press, told Military.com.
https://www.military.com/daily-news/2018/06/24/army-spending-half-billion-train-troops-fight-underground.html
But the Pentagon's new focus on preparing to fight peer militaries such as North Korea, Russia and China changed all that.
An assessment last year estimates that there are about 10,000 large-scale underground military facilities around the world that are intended to serve as subterranean cities, an Army source, who is not cleared to talk to the press, told Military.com.