The Officers oath contains a phrase not contained in the Enlisted oath:
"that I take this obligation freely, without any mental reservations or purpose of evasion; and that I will well and faithfully discharge the duties of the office upon which I am about to enter; So help me God."
If they had mental reservations, resignation was the proper course.
I know. I've taken both. That's why I said what I did. Thanks for the confirmation.