Culture of the United States Marine Corps
Two styles of swords are worn by Marines. The Marine Corps officers' sword is a Mameluke Sword, similar to the Persian shamshir presented to Lt. Presley O'Bannon after the Battle of Derna during the First Barbary War. After its adoption in 1825 and initial distribution in 1826, Mameluke Swords have been worn by Marine officers ever since, except during the period 1859–1875, when they were required to wear the Army's Model 1850-foot officers' sword. Upon returning to the traditional sword, many officers gave their Army swords to their senior noncommissioned officer, creating the basis for the NCO sword. Generally, Marines are the only branch where enlisted members regularly carry a sword (the Army authorizes platoon and first sergeants to carry a Model 1840 sword during some ceremonies, while the Chief of Naval Operations authorized Chief Petty Officers and above to carry an optional ceremonial cutlass with dress uniforms in 2010).
Model 1840 army noncommissioned officers' sword
It was carried by sergeants during the Mexican–American War and the American Civil War; it was worn either on a white or black baldric or with an Enfield bayonet frog. A shorter version with a 26-inch blade was carried by musicians, this was called the Model 1840 musicians' sword. NCOs of the rank sergeant and above were to carry it. During the Mexican–American War, it was more likely to be carried. It wasn't always issued to volunteer regiments during the Civil War. The sword replaced the sword more commonly known as the Model 1832 foot artillery sword which was used by both the infantry and the artillery regiments from 1832 to 1840.