If you were an army Sergeant Major, Marines wouldn't confront you, because you would be squared away. The Marine would have politely said, “Good afternoon, morning or whatever, Sergeant Major and he would have courteously replied to the Marine.
Myself, I would never be an Army Sergent Major.
I’m just a little, old third class Boatswain’s Mate on an old grey lady amphib carrier named, “Peleliu.”.
But, I was damn good at it.
;-)