[jonah]

"It depends." Two data points that I know of first hand:

1) There is a dedicated microwave link between Vandenberg Space Force Base and Edwards Air Force Base. Mil. owned and operated solely for their own use.

2) The US Federal government decided to build a standardized communications network for government/first responders/etc. This is FirstNet. They farmed the build-out to AT&T and gave them 20 MHz of bandwidth (Band 14) but it runs over their standard wireless infrastructure and network but FirstNet traffic gets prioritized.

https://www.firstnet.gov/

https://www.firstnet.com/

https://en.m.wikipedia.org/wiki/First_Responder_Network_Auth...