I looked at the Army War College Wikipedia page, and if you scroll down to See Also there is a list of US military schools.

I don’t know any outside the military. There are partnerships, like the National Supercomputing Center at U. of Illinois.

US Naval Academy. https://en.wikipedia.org/wiki/United_States_Naval_Academy

West Point. U.S. Air Force Academy. They once had a huge school for heroine addicts near Lexington, KY. William Burroughs did some time there in the late 40’s after he got kicked out of NYU. One of two schools. I think other one was near Pheonix out in the middle of the desert.

I think each branch of the military has their own academy. They are all legit 4 year universities.

National Defense Univ link

I still can’t find a civilian example. I thought there was a foreign service school, but it’s a program at Georgetown University, a private school.

I’m sure I didn’t find them all but here are accredited colleges and universities in the military:

United States Military Academy
Naval Academy
Air Force Academy
Coast Guard Academy
Merchant Marine Academy.
Marine Corps University
Air University
Air Force Institute of Technology
United States Army Command and General Staff College
National Defense University
Naval War College