Other: Checked with a couple of friends with relatives in the armed forces
I'm writing a Batman fanfic.
I have a former Green Beret. He's just caught someone breaking into a property he owns. The man is wearing an army jacket with a sergeant rank insignia on the sleeve. The man has no ID on him.
Wiki'ing the Green Berets tells me that, in all likelihood, my ex-military ex-cop was also a sergeant.
Is there a derrogatory term that, as a former GB, might have for a 'mere' army sergeant? If it matters, he neither knows nor cares whether his prisoner is actual army or just picked up the jacket and insignia at a surplus store. The character is a bully and a blusterer.