British Army officer rank insignia were ordered to wear the same collar as other General officers, but no device in the collar. In 1880, War Office ordered to move rank badges from collar to shoulder. In 1921, the War Office abolished the rank of Brigadier General and introduced a new rank called Colonel Commandant (Officer commanding a Brigade) or Colonel on the staff (officer not commanding a Brigade, but staff officer). The badges of Colonel Commandant and Colonel on the staff were the same, consisting of a crown and three stars. In 1928, Brigadier rank was introduced by abolishing the ranks of Colonel Commandant and
United States Air Force officer rank insignia uniforms while on duty, but even when in uniform they often do not wear rank insignia. However, when attending Professional Military Education courses, they do wear rank insignia. The current Air Force officer rank names and insignia were taken from the Army upon the establishment of the Air Force as a separate service in 1947. The insignia have been essentially unchanged since then, except for a brief period during the 1990s, when then-Air Force Chief of Staff General Merrill A. McPeak redesigned the service dress uniform. His redesign replaced the metal rank insignia for officers with silver braid on the