U.S. Marine assigned to Marine Corps Base Quantico Band, perform during the opening ceremony for the Modern Day Marine exposition at Lejeune Field, Marine Corps Base Quantico Sept. 23, 2014. Modern Day Marine is co-sponsored by Marine Corps Base Quantico, home to the Combat Development Command and the Marine Corps Systems Command, which are responsible for setting the requirements, developing and purchasing the equipment and systems that the Marine Corps will rely on in the years to come.