"18.3.2.1 Clearly Illegal Orders to Commit Law of War Violations. The requirement to refuse to comply with orders to commit law of war violations applies to orders to perform conduct that is clearly illegal or orders that the subordinate knows, in fact, are illegal. For example, orders to fire upon the shipwrecked would be clearly illegal." https://ogc.osd.mil/Portals/99/department_of_defense_law_of_war_manual.pdf