Culture of the United States Marine Corps reminder to provide good order and discipline. 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. The official Marine Corps emblem is the Eagle, Globe, and Anchor, sometimes abbreviated "EGA". Adopted in its present form in 1868 by Commandant Jacob Zeilin, it derives partially from ornaments worn by the Continental Marines and the British Royal Marines, and is
Sergeant Major of the Marine Corps Marine Corps and typically serves a four-year term, though his service is at the discretion of the Commandant. Since Sergeant Major Wilbur Bestwick was appointed the first Sergeant Major of the Marine Corps in 1957, 17 different Marines have filled this post. On January 20, 2015, Commandant Joseph F. Dunford, Jr. announced that Sergeant Major Ronald L. Green would relieve Sergeant Major Micheal P. Barrett and serve as the 18th Sergeant Major of the Marine Corps on February 20, 2015. Sergeant Major of the Marine Corps Sergeant Major of the Marine Corps (officially abbreviated to SMMC<ref name="ALMAR 016/09"></ref>) is a