According to Wikipedia, Gen Mark Milley is retired. Can he be demoted if he's retired? Saw something about this in a previous notables. Sometimes I only have time to read notables so don't know if this has been discussed further.
From wikipedia: https://en.wikipedia.org/wiki/Mark_Milley
Mark Alexander Milley is a retired United States Army general who served as the 20th chairman of the Joint Chiefs of Staff from October 1, 2019, to September 30, 2023.