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
Organization of the United States Marine Corps Expeditionary Force). The commander of the former also serves as commanding general for Fleet Marine Force, Atlantic, Marine Corps Forces, Europe, Marine Corps Forces, South, Marine Corps Forces, Strategic, and Marine Corps Installations East; while the latter serves as commander of Fleet Marine Force, Pacific, Marine Forces Central Command, and Marine Corps Installations West. The Supporting Establishment includes Combat Development Command, Recruit Depots, Marine Corps Logistics Command, Marine Bases & Air Stations, Marine Corps Recruiting Command, and the United States Marine Band. Since the U.S. Marine Corps and the U.S. Army both believe that their combat capabilities overlap each other,