<P> The Culture of the United States Marine Corps is widely varied, but unique amongst the branches of the United States armed forces . Because its members are drawn from across the United States (and resident aliens from other nations), it is as varied as each individual Marine, but tied together with core values and traditions passed from generation to generation of Marines . 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' embracement of its rich culture and history is cited as a reason for its high esprit de corps . </P> <P> Many traditions and customs of the Corps are officially recognized through orders, histories, and ceremonies; some are even embodied within the uniform itself . </P> <P> The Marine Corps Core Values of Honor, Courage, and Commitment have gained increased prominence in recent years . As an emphasis on performing morally on and off duty, the concept of core values has been infiltrated into many aspects of Marine life, beginning in recruit training and continuing into combat . This "warrior ethos" provides guidance to Marines in difficult ethical situations and acts as a reminder to provide good order and discipline . </P> <P> The Marines' Hymn dates back to 1919 and is the oldest official song in the U.S. Armed Forces . It embraces some of the most important battles of the Corps at that time, including Chapultepec and Derna . Subtle changes and unofficial verses have been added as the history of the Corps grew . </P>

What are the values of the marine corps