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
History of the United States Marine Corps Marine Corps Reserve in 1918 during World War I, officially becoming the first female Marine. From then until the end of World War I, 305 women enlisted in the Corps. The Marine Corps had entered the war with 511 officers and 13,214 enlisted personnel and, by 11 November 1918, had reached a strength of 2,400 officers and 70,000 enlisted. The war cost 2,461 dead and 9,520 wounded Marines, while eight would earn the Medal of Honor. Between the world wars, the Marine Corps was headed by Major General John A. Lejeune, another popular commandant. The Marine Corps was searching for