When are military personel not talking officially?

When they are sharing their own viewpoint and not the official viewpoint of the military as an organizational whole.

…have you seen Sen. Kelly prosecution by trump-hegseth-dptOfWar, they claim retired military personel do not have free speech, aka they are always bound to speak officially.

Actually, what they are trying to charge him for is sedition for encouraging troops to disobey orders, which is even worse (nonsense) than charging him merely for speaking unofficially.