What principle mandates that members of the armed forces must refuse an order that is illegal or unconstitutional?

💡 Explanation:

The duty to refuse an unlawful order is a fundamental tenet of military law and international law, such as the Nuremberg Principles. It holds that a service member's ultimate allegiance is to the law and the Constitution, superseding the obligation to obey a superior's order if that order is clearly illegal or unconstitutional. Failure to refuse a manifestly illegal order can result in the subordinate being held accountable.