aid-de-camp

[eyd-duh-kamp] /ˈeɪd dəˈkæmp/
noun, plural aids-de-camp.
British Dictionary definitions for aid-de-camp

aide-de-camp

/ˈeɪd də ˈkɒŋ/
noun (pl) aides-de-camp, aids-de-camp
1.
a military officer serving as personal assistant to a senior ADC
Word Origin
C17: from French: camp assistant