The Probert Encyclopaedia of Warfare

BREVET

A brevet is a commission giving an officer higher rank than that for which he receives pay, a type of honorary promotion of an officer. In the United States army, rank by brevet is conferred, by and with the advice and consent of the Senate, for gallant actions or meritorious services. A brevet rank gives no right of command in the particular corps to which the officer
brevetted belongs, and can be exercised only by special assignment of the President, or on court martial, and detachments composed of different corps, with pay of the brevet rank when on such duty.
Research Brevet