Aide-de-camp
WordNet
noun
(1) An officer who acts as military assistant to a more senior officer
WiktionaryText
Noun
- A military officer who serves as an adjutant to a higher ranking officer, prince or other high political dignitary.
- Unlike the orderly or batman, a humble low-ranking servant, an aide-de-camp is often a general, who before the institution of the chief of staff could hold a similar position to his chief.