History of the Office of The Inspector General of the United States Army (IG January 10, 1863April 1, 1864; January 2, 1881March 8, 1885) was assigned as the "de facto" head of the Office of the Inspector General, which, until then had not existed. 2 major generals, 7 brigadier generals, 18 colonels, 118 lieutenant colonels, and 149 majors of the regular army served inspector duty during the Civil War. On January 22, 1866, a War Department order established the duties of the inspector general as: In July 1866, the number of inspectors general with the rank of colonel was fixed at four; assistant inspectors general with the rank of lieutenant colonel at three;
General of the Army (United States) also the only person to hold a five-star rank in two branches of the U.S. Armed Forces. These officers who held the rank of General of the Army remained officers of the United States Army for life with an annual $20,000 (equivalent to $180,000 in 2016) pay and allowances. They were entitled to an office maintained by the Army along with an aide (of the rank of colonel), a secretary and an orderly. No officers have been appointed to the rank of General of the Army since Omar Bradley. The rank of General of the Army is still maintained as