Generals present and him from the ranks! Perhaps he's been invited to serve the drinks.
Doesn't only happen that way.
Once upon a time, a small island in the med, saturday morning VVIP visit involved touring extensive fuel installations, trip out with MCU to the dolphin, briefing / presentation etc. All senior officers, et moi as "the man on the ground"
Endex in 1* ofice, he suggests drinks. All present speak their preference, me at end of row - 1* looks to me with eyebrow raised, I, feeling somewhat smug to be in such exalted company, respond " G & T sir".
1* - " I wasn't asking you what you would like, I was indicating the drinks cabinet and hinting that it is your place to pour'em" !!
(Said 1* was in fact an excellent guy, and did it with a hint of humour)