Surely you are aware that Trump had no ability to fire Milley after the Comey firing. After that, Graham and McConnell were very open that they would support impeachment for any more firings. Also Trump had to choose from McConnell’s list. McConnell the closet homo (kicked out of the Army) refused to go into recess for the entire Trump presidency to prevent recess appointments. He did it for Obama, but not for Trump.
Not to mention, among American generals and admirals, there is nothing else to choose from except woke. There is not a single three or four star extant that is different to the slightest degree. Probably nobody above Colonel.
What makes you think the Uniparty won’t Impeach, and remove him.