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 Army enlisted rank insignia was briefly termed lance corporal. In 1966, the rank of Sergeant Major of the Army was established, its holder an assistant to the Army chief of staff. Considered a higher grade than sergeant major (or than command sergeant major from 1968), the Sergeant Major of the Army didn't receive its own unique rank insignia until 1979. In 1968, the rank of command sergeant major was established as an assistant to the commanding officer at battalion, brigade, division, and corps level. Also, that year the insignia of private first class received one arc under the chevron. In 1978, the rank of