Moments before his arrest by Capitol Police in Washington, D.C., active duty Air Force Major Jason Watson delivered an historic address to a group of reporters and activists convened in front of Congress, becoming the nation’s first active duty service member to call for the immediate impeachment and removal of the Commander in Chief, President Donald Trump, and Vice President JD Vance.
The basis of the US military is don’t touch our boats.
But to answer you’re question, it depends on whether or not the order issued is legal. Follow an order to commit a war crime, and you go to prison and get dishonorably discharged.
…well, on paper at least. Real world application is enforced selectively.