An underground base is a subterranean facility used for military or scientific purposes.
Examples are:
- Cheyenne Mountain Complex
- Chiashan Air Force Base
- Iranian underground missile bases
- Raven Rock Mountain Complex
- Željava Air Base
There may be more than 10,000 underground military facilities worldwide.1
References
References
- Richelson, Jeffrey T. "U.S. Intelligence: Hiding of Military Assets by "Rogue Nations" and Other States a Major Security Challenge for 21st Century". gwu.edu. George Washington University. Retrieved 16 July 2020.