Charles Klein was an English-born playwright and actor who emigrated to America in 1883. After moving to New York City in 1883, Klein began acting. He began writing by 1890, soon working for producer Charles Frohman. Among his works was the libretto of John Philip Sousa's operetta, El Capitan (1896). He wrote melodrama and dramatic plays in the first 15 years of the 20th century.

John Philip Sousa was an American composer and conductor of the late Romantic era known primarily for American military marches. He is known as "The March King" or the "American March King", to distinguish him from his British counterpart Kenneth J. Alford. Among Sousa's best-known marches are "The Stars and Stripes Forever", "Semper Fidelis", "The Liberty Bell", "The Thunderer", and "The Washington Post".