Yeah I had a discussion with family about this plane watch thing this morning. Commercial airliners (767s) can be chartered for the purpose of military troop movements, but I’m not sure they would be ID’d as military on a flight tracker site. Please correct me if I’m wrong.
Not an expert in military but I am a civilian pilot and I do follow aviation stuff whether civilian or military. There is a bunch of technology out there to keep civilian planes separated so they don’t go bump. This technology is both in planes (at varying levels) and ground-based. The military can use civilian air traffic control or not. The military systems are beyond my knowledge. One can imagine that it’s pretty incredible because the civil stuff is pretty incredible. Think battlefield management for the skies.