Military officers cannot follow UNLAWFUL orders no matter WHO gives them the order. They are subject to COURTMARTIAL or CIVILIAN arrest/trial. See Article 90 and 92 of the Uniform Code of Military Justice.
All commanders have access to LEGAL COUNSEL. If prohibited by LAW, they must REFUSE.
If the Commander of Southern Command is stepping down less than a year into his tenure, I’m guessing we’re about to find out the intelligence picture on these “narco-terrorist” vessels that we’re blowing out of the water isn’t as solid as it’s being portrayed.