General-in-chief military forces in the field, as the generals-in-chief did in the 19th century. The rank of "General of the Armies of the United States" was conferred upon General John J. Pershing in 1919 and to Lieutenant General George Washington (posthumously) in 1975 by acts of Congress. Washington's date of rank was retroactively dated to 1799, so that he will always be the senior ranking general of the United States Army. (American general ranks and titles may be a little confusing; however, as reference is cited the public domain information of the Center for Military History of the United States Army
General officers in the United States generalissimo or grand marshal, and they have never been used at the same time as all other general-officer ranks. The rank of General of the Armies has been held only by John Pershing, promoted in 1919, and George Washington, promoted posthumously in 1976 as part of American Bicentennial celebrations. The rank of Admiral of the Navy has been held only by George Dewey, promoted in 1903 with date of rank retroactive to 1899. Proposals to bring back these ranks was made during World War II, with Douglas MacArthur and Chester W. Nimitz under consideration for appointment as General of the