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
History of the United States Marine Corps high rates of courts-martial, non-judicial punishments, unauthorized absences, and outright desertions. The re-making of the Marine Corps began in the late 1970s when policies for discharging inadequate Marines were relaxed leading to the removal of the worst performing ones. Once the quality of new recruits started to improve, the Marines began reforming their NCO corps, an absolutely vital element in the functioning of the Marine Corps. After Vietnam, the Marine Corps resumed its expeditionary role. On 4 November 1979, Islamist students supporting the so-called Iranian Revolution stormed the Embassy of the United States in Tehran and took 53 hostages, including