Fort Knox?
Former home of Armor, largely stripped of combat missions some years ago. Basic training for armor/mech troops went to Benning, the big units went to Hood. The only thing left was the Army backfilled with their personnel functions, got that out of the DC area IIRC. So there’s lots of room at Knox for a few hundred command staff, lots of room and infrastructure for a tank-heavy force in the future. And Euro-style terrain to practice in, as opposed to Middle Eastern desert-like terrain at Hood.
“Fort Knox?”
V Corps was a heavy armor counterstrike force.
Fort Knox is where the Army’s Armor Center and School are located. It is a big base, that can house a lot of potential tenants, and is the Army’s Center of Excellence for things Tank (armored vehicle) related.
When V Corps was in Germany, they would train at Grafenwoehr. In addition to the big ranges for the tanks to chase each other around, they also had a bunch of tank simulators, which the crews would occupy, and fight simulated battles in cyberspace. When they did, the OPFOR (Opposing Force) crews that fought them, using Russian tactics, were located on Fort Knox. They met over the Internet, on a virtual battlefield.
Then it was a big deal (technically), but now that is common for video games.