The Uniform Code of Military Justice (UCMJ) 809.ART.90 (20), makes it clear that military personnel need to obey the ‘lawful command of his superior officer,’ 891.ART.91 (2), the ‘lawful order of a warrant officer’, 892.ART.92 (1) the ‘lawful general order’, 892.ART.92 (2) ‘lawful order’. In each case, military personnel have an obligation and a duty to only obey Lawful orders and indeed have an obligation to disobey Unlawful orders, including orders by the president that do not comply with the UCMJ. The moral and legal obligation is to the U.S. Constitution and not to those who would issue unlawful orders, especially if those orders are in direct violation of the Constitution and the UCMJ.
During the Iran-Contra hearings of 1987, Senator Daniel Inouye of Hawaii, a decorated World War II veteran and hero, told Lt. Col. Oliver North that North was breaking his oath when he blindly followed the commands of Ronald Reagan. As Inouye stated, ‘The uniform code makes it abundantly clear that it must be the Lawful orders of a superior officer. In fact it says, ‘Members of the military have an obligation to disobey unlawful orders.’ This principle was considered so important that we-we, the government of the United States, proposed that it be internationally applied in the Nuremberg trials.’ (Bill Moyers, ‘The Secret Government’, Seven Locks Press”
