He deserves prison. If you can't follow the chain of command, and follow orders of a superior, then you are the problem and must be removed. Milley had no legitimate reason to assume anything. That was no his place as he is not the President of the United States, nor will he ever be.
Why should any Soldier follow their chain of command if no one even has to follow the orders of the Commander in Chief? I know about 40% of the force that has decided they dont want the vaccine, but are being forced to take it. If they learned that their senior leaders are openly disobeying the lawful order of the President of the United States, how should that play out? If they decided to disobey the lawful order of their commanders due to Milley's treasonous behavior, do you believe that should be the norm?
Milley did nothing but play himself, and God willing he will pay for it with his career because THAT is what Military Law demands.
What Miltary branch and unit were you with again? Im absolutely sure you are a civie, as you clearly know nothing on the subject and its importance.