A friend of mine taught at West Point for many years. He had been career military and after retirement, left teaching to get his PhD.
Clinton changed the rules that you no longer had to be former military to be on WP faculty. What that meant was they no longer hired former military for WP faculty.
He couldn’t get his old job back.
I was at West Point immediately prior to Clinton’s election. The vast majority of faculty were active duty Army. Of the few that were civilians, I don’t think they were all former military even back then.