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
British Army other ranks rank insignia officer appointments are different, with, for example, "regimental corporal major" being used in place of regimental sergeant major. Uniquely, NCOs and warrant officers of the Household Cavalry do not wear any insignia on their full dress uniforms (although officers do). Rank is indicated by a system of aiguillettes. In several cavalry regiments including the 1st The Queen's Dragoon Guards and the Queen's Royal Hussars, NCOs holding the rank of lance corporal wear two stripes. Full corporals are distinguished by the addition of a cypher above their two stripes in dress uniforms. Staff sergeants in an appointment as squadron quartermaster sergeant