Yes, all Federal military personnel; Army, Navy, Air Force and Marines.
The Coast Guard is not covered, not that that really matters much.
The National Guard is exempt when under the control of their State Governor.
However, if they are called into service by the President, they become "federalised" and fall under the provisions of the Act.
Looks like another Trump dead end, doesn't it ?
"Plenty of other "federal force" at his disposal"The Posse Comitatus Act Explained | Brennan Center for Justice
