"The Oath of Enlistment (for enlisted):
"I, _____, do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; and that I will obey the orders of the President of the United States and the orders of the officers appointed over me, according to regulations and the Uniform Code of Military Justice. So help me God."
The Oath of Office (for officers):
"I, _____ (SSAN), having been appointed an officer in the _____ (Military Branch) of the United States, as indicated above in the grade of _____ do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foreign or domestic, that I will bear true faith and allegiance to the same; that I take this obligation freely, without any mental reservation 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."
I was taught as an officer that it was up to me to decide if an order was illegal and/or inappropriate (additional data on hand, changes in situation, etc) and that I would pay the consequences if I was wrong....so be right...achieve the mission, but always take care of your people.