On October 1, 1880, John Philip Sousa became the new director of the United States Marine Corps Band. An excerpt from the article:
"After his discharge from the Marine Corps, Sousa remained in Washington for a time, conducting and playing the violin. He toured with several traveling theater orchestras and moved, in 1876, to Philadelphia. There he worked as a composer, arranger, and proofreader for publishing houses. Sousa was fascinated by the operetta form and toured with a company producing the musical Our Flirtation, for which he wrote the incidental music and the march. While on tour in St. Louis, he received a telegram offering him the leadership of the Marine Band in Washington. He accepted and reported for duty on Oct. 1, 1880, becoming the band’s 17th Leader.
The Marine Band was Sousa’s first experience conducting a military band, and he approached musical matters unlike most of his predecessors. He replaced much of the music in the library with symphonic transcriptions and changed the instrumentation to meet his needs. Rehearsals became exceptionally strict, and he shaped his musicians into the country’s premier military band. Marine Band concerts began to attract discriminating audiences, and the band’s reputation began to spread widely.
Sousa first received acclaim in military band circles with the writing of his march "The Gladiator" in 1886. From that time on he received ever-increasing attention and respect as a composer. In 1888, he wrote "Semper Fidelis." Dedicated to "the officers and men of the Marine Corps," it is traditionally known as the "official" march of the Marine Corps."