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
Commandant of the Marine Corps over such of the members and organizations of the Marine Corps and the Navy as the Secretary determines, perform the duties prescribed for him by section 171 of this title and other provisions of law and perform such other military duties, not otherwise assigned by law, as are assigned to him by the President, the Secretary of Defense, or the Secretary of the Navy." Thirty-seven men have served as the Commandant of the Marine Corps. The first Commandant was Samuel Nicholas, who took office as a captain, though there was no office titled "Commandant" at the time, and the Second