The U.S. Army is a huge institution with centuries of history. It has never been an instrument of a particular political party and ideology. Its culture is constitutional and nonpartisan. So turning it into a militia would be a very difficult task, right?
Actually, no. All Pete Hegseth would have to do is require every soldier to take a new oath promising unqualified support to Donald Trump and Jesus Christ (possibly not in that order). Anyone refusing to take the oath would be discharged. Everyone left would be a “crusader” willing to kill for Trump regardless of the law and the Constitution.
This would almost certainly be illegal, of course. But what would Hegseth and Trump care? And what practical power would the judiciary have to resist the might of the military?