sentences:  In contrast to the previous grade of general held by Grant, Sherman, and Sheridan, which was a permanent promotion, this new rank was a temporary appointment that was lost when the officer vacated the position bearing that rank, and while Pershing was ultimately advanced to General of the Armies in 1919, March and Bliss reverted to their permanent grades of major general in the Regular Army when the National Army disbanded in 1920.In 1929, the temporary rank of general in the Regular Army was reauthorized for the office of chief of staff, whose occupant reverted to major general at the end of his term but was allowed to retire as a full general.When the draft force was reconstituted for World War II as the Army of the United States in 1941, the President was authorized to appoint as many temporary generals in that organization as he deemed necessary.