Royal Navy officer rank insignia the Corps also had the unique ranks of colonel second commandant and colonel commandant. Rank insignia are on brown or dark blue shoulder boards in all dresses save for the combat and barracks duty dress uniforms. From 1911 to 1957 the officer corps even included warrant officers and commissioned warrant officers in the same way as the RN. Although the Royal Marines does not officially use the rank of field marshal, the Captain General Royal Marines, the ceremonial head of the corps, wears a field marshal's rank insignia. Royal Navy officer rank insignia Uniforms for naval officers were not authorised
United States Air Force officer rank insignia sleeves, similar to the officer rank insignia not used by the US Navy and Coast Guard. This was similar to the rank insignia of the British Royal Air Force, the Canadian Armed Forces and other Commonwealth air forces. The uniform reforms also introduced for the first time in the USAF slip-on shoulder marks on the other uniforms, using the traditional rank insignia. The "McPeak uniform" was very unpopular, drawing comparisons to the jackets worn by airline pilots, and the traditional rank insignia were reinstated within a week of General McPeak's retirement in 1994 on the shoulder boards, while the slip-on