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
Marine Corps Intelligence determines what missions the Corps needs to carry out as well as who will need to be trained for that mission. MCIA is in partnership with Marine Corps Intelligence the Office of Naval Intelligence and Office of Coast Guard Intelligence in the National Maritime Intelligence-Integration Office and at Marine Corps Base Quantico in Quantico, Virginia. The MCISR-E is a warfighting enterprise that supports decision-making through the provision of tailored intelligence that is timely, relevant, and predictive. The enterprise supports institutional decision-making through both the provision of relevant intelligence and the comprehensive integration of the intelligence warfighting function in operating concepts,