United States Marine Corps off-base, except in transit to and from their place of duty and in the event of an emergency. As in any military organization, the official and unofficial traditions of the Marine Corps serve to reinforce camaraderie and set the service apart from others. The Corps' embrace of its rich culture and history is cited as a reason for its high "esprit de corps". The "Marines' Hymn" dates back to the 19th century and is the oldest official song in the United States armed forces. The Marine motto "Semper Fidelis" means "Always Faithful" in Latin, often appearing as "Semper Fi"; also
Sergeant Major of the Marine Corps Sergeant Major of the Marine Corps Sergeant Major of the Marine Corps (officially abbreviated to SMMC<ref name="ALMAR 016/09"></ref>) is a billet, as well as a unique enlisted grade of rank, with a unique non-commissioned grade of rank insignia, in the United States Marine Corps. In the U.S. Marine Corps, sergeant major is the ninth and highest enlisted rank, just above first sergeant, and equal in grade to master gunnery sergeant, although the two have different responsibilities. A sergeant major typically serves as the unit commander's senior enlisted adviser and to handle matters of discipline and morale among the enlisted Marines.