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"Semper Fidelis" is a Latin phrase meaning "always faithful". It is famously the motto of the U.S. Marine Corps. The phrase is also the title of a well-known march composed in 1888 by John Philip Sousa. Sousa, an American bandmaster and composer, is renowned for his military marches, and "Semper Fidelis" became the official march of the U.S. Marine Corps. Sousa composed 136 military marches, including other famous works like "The Stars and Stripes Forever".1234

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