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 officer rank insignia stars for general officers, worn on epaulettes. From 1821 to 1832, the Army used chevrons to identify officer grades, a practice that is still observed at West Point for cadet officers. In 1832, epaulettes were specified for all officers, and colonels began wearing the familiar eagle insignia. The epaulettes worn by the infantry were silver, while all other branches had gold epaulettes. In order that the rank insignia would be clearly discernible, they were of the opposite color; that is, the infantry colonels had an eagle of gold because it was placed on a silver epaulette and all other colonels