aid-de-camp

The gentleman wore the dress of an aid-de-camp, and the major knew him to be one of the military family of Washington.

In the first year of the war he was made an aid-de-camp to General Washington and in that capacity was with him in this battle.

As aid-de-camp to the Duke of Berwick he experienced thrilling adventures in Flanders.

His aid-de-camp was killed, but Bolivar's life was saved by the courage of his officers.

I remember exactly how he looked; he had his aid-de-camp with him.