of troops in formation—the Mameluke sword for officers, the NCO sword for NCOs and SNCOs. When wearing the sword and Dress Blue coat, officers wear the Sam Browne belt. For enlisted, the sword is worn with a white waistbelt and brass buckle when wearing the Dress Blue coat. The Marine Corps is the only branch of the United States military which regularly allows NCOs to carry a sword. For enlisted Marines, they earn the right to carry the NCO sword and wear the scarlet blood stripe on their blue trousers when they achieve the rank of Corporal. Members of the United States Marine Corps Band, and the United States Marine Drum and Bugle Corps are authorized different dress uniforms, known as Red-Dress (a scarlet blouse with a blue trim). Before 1998, certain ceremonial Marine units, such as the Silent Drill Platoon, wore a blue/white dress uniform in which white trousers were substituted for blue while performing ceremonial functions. The blue/white version is now an authorized summer uniform for officers, SNCOs, and on certain functions, NCOs. The Marine Corps Mounted Color Guard currently wears the blue dress coat with white riding breeches and polished black knee-high riding boots although in the past they have worn blue riding breeches with the red blood stripe. Another uniform, the obsolete Dress White uniform, was a white version of the standard dress coat and trousers, was authorized only for officers and SNCOs. It resembled the Navy's Officer/CPO dress whites. No blood stripes were authorized, and white shoes were worn. This uniform was superseded by the Blue/White Dress uniform in 2000. U.S. Navy The Dress White uniform consists of a stand-collar white tunic, white trousers, and white dress shoes. Rank for officers is displayed on shoulder marks for males and on the sleeve cuffs for females, while CPO rank insignia is worn on the collar for both sexes. Service dress white includes service ribbons, whereas full dress white includes service ribbons and medals. This uniform is informally called "Chokers", due to the stand-collar. The Dress Blue uniform consists of black shoes, navy blue (black in appearance) coat and trousers, a white shirt and either a Windsor or formal bowtie. As with the white uniforms, only service ribbons are worn with Service Dress Blue, while service ribbons and medals are worn with Full Dress Blue. Depending on the occasion, officers may also wear swords with either Full