Current norms among professional military officers that govern obedience and dissent strongly discourage officers from offering public criticism of policy enacted by civilian authorities, even if that policy is immoral, illegal, or unconstitutional. We identify a set of circumstances that create a moral imperative for an officer to take action and we leverage prevailing ethical guidelines to argue that in certain cases, even individual officers not directly involved in the execution of the policy have moral standing to offer public criticism (...) of it. We consider the consequences of relaxing norms prohibiting public dissent and explore the trade-off between tolerating immoral policy and the likelihood of mistakenly criticizing appropriate policy. Finally, we offer evidence that current military-civilian relations in the United States are such that placing higher value on dissent would benefit professional military officers and may improve policy. (shrink)