By "the military" do you mean every single member of the military? Or just some of them? If the military has a DUTY not to obey unConstitutional orders, just how many of the military must observe this duty in order to question the legitimacy of Obama? What's the magic number that would make the questioning of Obama's legitimacy into the performance of a DUTY?
Every member of the military should assume he is legitimate unless and until he is found to be otherwise.
If this LTC thought Obama was not a legitimate Commander in Chief, then why didn’t he retire ASAP and go to court?
“What’s the magic number that would make the questioning of Obama’s legitimacy into the performance of a DUTY?”
There is no number. Zero. It isn’t for a standing army to decide who is their CINC.