1. A body of officers who direct the military policy and strategy of a national state.
2. A group of officers charged with directing a division or higher unit and operating from a headquarters under a commander in chief.

In the U.S. Army, the supreme military staff for policy and strategy, consisting of the Chief of Staff, several deputy and assistant Chiefs of Staff, including those heading sections of personnel administration (G-l), military intelligence (G-2), and operations and training (G-3), the Comptroller of the Army, the Director of the Women's Army Corps, and other officers.