It's fun to watch planes on adsb. But with the military you just don't know. Sometimes you will see planes take off and just circle an airport nearby. Might be practicing or burning fuel to meet some quota.

Sometimes they'll do circles in the middle of nowhere. Might be waiting in a holding pattern. This is often seen when the President or Vice President fly publicly somewhere like a rally since they travel in pairs.

One thing is certain if you can see them on the adsb tracking sites then they know every one else can see them. It is a piece of equipment that they can turn on and off(and even reprogram!)