If an officer is told by his commander to turn on the oven and he chooses to ignore it.... what then?
Assuming you're comparing U.S. soldiers to Nazis, then it doesn't take a genius to figure out what the oven is for and refuse to obey an illegal order in support of a criminal act.
But getting back to reality for a moment, what is illegal about an order to report to your brigade commander's office? Are you honestly trying to convince us that it's analogous to and order to commit genocide?