Very normal for night quals/parachute jumping.
Look- I love planefags….I do. However, in the event "operators are active" on US soil- you will NEVER see them on adsb. They'll be ghosts. Enjoy your tracking though. It's good fun.
They're in the middle of nowhere, anon. There is nothing there to "invade" or do. They land, get in vans, and go to the base. If they were dropping strings of marines across Washington DC- you'd have my attention.