Would an E9 comply if ordered to attention by an O1?

Even if the CSM is wrong, there's a tactful and professional way to handle that, then, there's this way. Just like there's a difference between saying "hey CSM, just wanted to let you know your boot's unbloused" and saying "hey, guy, fix yourself."

Under the uniform code of military justice, the short answer is yes. However, those of us who know how things are really done and where respect is really earned.

I think the word "attention" can be used in a fashion to where it feels like you're in control of a situation. No matter what your grade is or how many days you have left in the service, disrespect is disrespect. What goes for a private should go for an SGM/CSM

One of the best moments in my enlistment...
2nd LT walks by a MSgt and CWO3 talking. Neither salute
Lt: So neither of you have the intention of saluting an officer today?
MSgt: Sir, you can have our salute when you climb up our rockers to get it.
Lt walks away speechless.

I'd have come to attention right in his face and he'd have squirmed like the worm he is. I spent my last 10 years training officers and it's not hard to put them in their place without being insubordinate.

No way in hell a butter bae would dare call a CSM to attention. They wouldn't have the balls.

Yes by the book only respect for the rank

Yes

I've never seen an O1 so brave lol

01 can call an E9 to attention, not advisable but hey if he has the testicular fortitude to do so better stand by for heavy rolls afterwards

During the time I was in I saw several E9s and there were only a very few that could and would tell him or her what to do and I'm sorry to say it an OK was not one of them.

So 2LT tells BN CSM that her bar outranks his stripes and that he can't order an officer to do anything. This happens in the CSM's office. BN XO, ENG, prior INF, hears this. He calls thr 2LT into his office, and through a closed door, we hear him destroy her soul. "How can I give you a command if you don't respect your NCOs?" "He has been in this unit longer than you have been in the Army!" Et cetera, et cetera... when she was dismissed, she ran out crying.

Would he or she HAVE to comply? Technically, yes, or they would be in violation of military regulations. I would imagine there would be an interesting conversation shortly thereafter, however.

Well, you know the drill... If the situation is unethical, no! If the LT is legit, yes.

Technically, they should as it is a lawful order. The reaction of the E9 depends on the circumstances. In ceremony and day to day military courtesy it is appropriate for the E9 to set the example. If it originated from the O1's ego, there would certainly be a conversation that followed. A good E9 worth his salt would attempt to advise and mentor that young officer but if that officer was not receptive to the seasoned guidance being offered then it would be necessary to involve the CO.

It should never come to that.

Question should be: "Should an E9 comply if ordered to attention by an O1?" Yes, in public. no question. Maybe not in private (no audience). It boils down to a courtesy correction. I guess it really boils down to: are you truly a professional, or an ass-hat.

Yes

I saw a MGySgt tell a boot Lt. "Climb up my stripes and get it!!" in reference to a salute when i was a young boot... That man was like a god after i saw that happen hahaha

1) "That" is something that would never happen in the Corps. 2) SgtsMaj don't usually have the opportunity to interact with officers below Major unless it is in passing. 3) Rank is one thing; power is another. An 0-1 (or an O-2 or 0-3 for that matter) doesn't "out power" the SgtMaj.