aide-de-camp

military officer who performs secretarial duties for a superior officer; personal assistant

(French) "camp assistant", military officer, adjutant; civilian aide

An aide-de-camp (French for camp assistant) is a personal assistant, secretary, or adjutant to a person of high rank, usually a senior military officer or a head of state. The first aide-de-camp is typically the foremost personal aide.Geraud Duroc was made an aide-de-camp to Napoleon in 1796, and first aide-de-camp in 1798. In some countries, aide-de-camp is considered to be a title of honour (which confers the post-nominal letters ADC), and participates at ceremonial functions.
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Noun
1. an officer who acts as military assistant to a more senior officer
(synonym) adjutant, aide
(hypernym) military officer, officer
(hyponym) adjutant general
(classification) military, armed forces, armed services, military machine, war machine