That's why I get pissed about stories of the variety "X resigns rather than follow administrations orders". People seem to cheer when that happens because they see it as people pushing back on illegal orders, but they're not. They're just bailing from responsibility when they were one of the few people in the position to legitimately be a stopgap on this runaway power abuse. In resigning, they've just made it easier for a loyalist or morally corrupt replacement to come in and roll out the red carpet to the autocracy. Stay right where the fuck you're at, plant your feet, and tell them that you're absolutely not following illegal orders from anyone. That is worth cheering.

I know youre being funny about it, but I need to point out the officer's oath is not to the president, and the supreme court is irrelevant in this.

Specifically any orders which violate the constitution, federal law, or (specifically an "or" here, not "and") international law should be refused. Typical examples are torturing people who are detained, targeting civilians, etc.

Not exactly. They ruled the president cannot be prosecuted for illegal acts taken in the capacity of president. So it's more "he can do illegal shit and we can't stop him" and less "anything he does it automatically legal". So refusing an illegal order would presumably still be a valid route of action.

But from what I know about the military, they can just punish you in some other capacity even if what you did is technically legal. Ie reassigning you to some shit duty or miserable location.