Some of those mountain fortresses and tunnel complexes have been there for over 150 years, started back when the British were at war with Afghanistan.
https://www.youtube.com/watch?v=zRi_5sUa4e4
“Screw-Guns” by Rudyard Kipling
‘YOU CAN HIDE IN THEM CAVES.. THEY’LL JUST BE YOUR GRAVES... BUT YOU WON’T GET AWAY FROM THE GUNS”