Authority is not the whole test
Classify before you conclude.
The supplied post places civilian authority beside constitutional duty and an illegal-order exception. Use this aid to keep those questions separate and make uncertainty explicit.
Describe the situation
interpreted branch
authority and dutyFollow lawful authority; preserve duty
On the stated facts, the aid keeps obedience to civilian leaders and constitutional duty in view. It does not turn disagreement into illegality.
Next question: what source, order text, and legal basis support the classification?