The Marines' Hymn was originally the march section of a comic opera, Genevieve de Brabant, by Jacques Offenbach, which was first performed in 1859. It became the official US Marines' Hymn in 1929 ...

The US Army’s song is “The Army Goes Rolling Along,” adopted in 1952. The US Marines’ song, “The Marines’ Hymn,” was first adopted in 1929 and updated in 1942.

Marines have previously stood quietly at attention when the "Marines Hymn" is played.

Previously Marines were directed to stand at attention during the playing of the Corps’ official song, the Marines’ Hymn ― a tradition that dates back to just after World War II.