March Man is a term used to describe John Philip Sousa, an American composer and conductor of the late 19th and early 20th centuries. He is best known for his military marches, earning him the nickname 'The March King'. He wrote over 130 marches during his lifetime, including 'The Stars and Stripes Forever', which is the national march of the United States. He was also a bandmaster of the United States Marine Corps and served as director of the U.S. Navy Band. Sousa's legacy lives on today in the form of his marches, which are still performed by marching bands around the world.