Jody,  In response to Matthew Caulfield's request for information on
The Marine's Hymn, the official tune is performed by the band here:
https://www.youtube.com/watch?v=sSRlQPD6Xiw
 

From the Marine Corps Band website:
  Composer: Jacques Offenbach
  Genre: Holiday

The USMC Ceremonial Music page is found here:
http://www.marineband.marines.mil/Audio-Resources/Ceremonial-Music/ 

Respectfully,

WG Chapman - Curator of Organs
USMA USAG RSO WP NY

 [ United States Military Academy
 [ U.S. Army Garrison  Religious Support Office
 [ West Point, New York

 [ At http://www.marineband.marines.mil/About/Library-and-Archives/The-Marines-Hymn/ 
 [
 [ "The music to the hymn is believed to have originated in the comic
 [ opera Geneviéve de Brabant composed by the French composer Jacques
 [ Offenbach.  Originally written as a two-act opera in 1859, Offenbach
 [ revised the work, expanding it to three acts in 1867.  This revised
 [ version included the song "Couplets des Deux Hommes d'Armes" and is
 [ the musical source of The Marines' Hymn."
 [
 [ See also http://marissabidilla.blogspot.com/2007/12/gendarmes-duet.html 
 [ and https://en.wikipedia.org/wiki/Marines%27_Hymn  -- Robbie