...promotion, and discharge of reserve officers. It performs such other militan' duties not otherwise a.tsigned by law as may be from time to time prescribed by the President, and renders professional aid and assistance to the Secretary of War and the Chief of Staff. The Deputy...

...and to act as their agents in informing and co-ordinating the action of all the different officers to the supervision of the chief of staff; and to perform such other duties not otherwise assigned by law as may be prescribed by the pn Aident. The general staff corps...

...the Secretary of War and to general officers and other superior commanders and to act as their agents in informing and coordinating the action of all the different officers who arc subject to the supervision of the Chief of Staff, and to perform such other military duties not...