aide-de-camp
Pronunciation:
/ˌeɪd dɪ ˈkæmp/noun
Definitions
A military officer who serves as an adjutant to a higher ranking officer, prince or other high political dignitary.
Example: 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.