The United States Marine Band is the premier band of the United States Marine Corps. Established by act of Congress on July 11, 1798, it is the oldest of the United States military bands and the oldest professional musical organization in the United States. Today, the Marine Band includes the Marine Chamber Orchestra and Marine Chamber Ensembles. The Marine Band is entirely separate from its sister military band, the United States Marine Drum and Bugle Corps ("The Commandant's Own") and the 10 active duty Marine Corps field bands.
https://en.wikipedia.org/wiki/United_States_Marine_Band