United States Marine Corps A decade later, in the Mexican–American War (1846–1848), the Marines made their famed assault on Chapultepec Palace in Mexico City, which would be later celebrated as the "Halls of Montezuma" in the Marines' hymn. In the 1850s, the Marines would see further service in Panama and Asia, attached to Matthew Perry's East India Squadron on its historic trip to the Far East. The Marine Corps played a small role in the Civil War (1861–1865); their most prominent task was blockade duty. As more and more states seceded from the Union, about a third of the Corps' officers left the United
Sergeant Major of the Marine Corps The Sergeant Major of the Marine Corps is chosen by the Commandant of the Marine Corps to serve as his adviser and is the preeminent and highest ranking enlisted Marine with an order of precedence of a lieutenant general. Although not officially considered a Sergeant Major of the Marine Corps, when Archibald Sommers was appointed to the grade of Sergeant Major January 1, 1801, it was a solitary post, similar to the modern billet of Sergeant Major of the Marine Corps. In 1833, an act of legislation made the rank of sergeant major permanent for the Marine Corps and by