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;
United States Army officer rank insignia no living officer holds either of these ranks today, the General of the Army title and five-star insignia designed in 1944 are still authorized for use in wartime. Congress may promote generals to this rank for successful wartime campaigns, or to give the officer parity in rank to foreign counterparts in joint coalitions, specifically with respect to field marshals. United States Army officer rank insignia United States Army Officer rank insignia in use today. Warrant Officers (WO) and Chief Warrant Officers (CW) in the US Military rank below officers but above officer candidates and enlisted servicemen. The first warrant officer