Joonuper reposted
Senator Kelly is correct. Plus a Public Service Announcement: KEY section of Department of Defense's Law of War Manual is 18.3.2.1. The VERY rule on the "requirement" to refuse illegal orders gives as its paradigmatic example of what is "clearly illegal: "orders to fire upon the shipwrecked."
Mark Kelly on the Trump/Hegseth boat strikes: "If orders are illegal, not only do they not have to follow them, they are legally required not to follow them."