Which popular music style was a modification of the marches from "The March King" with heavy influences from African American communities?
Ragtime:  The composition was published in 1895, a few months after Ernest Hogan's "LA Pas Ma LA." Ragtime was also a modification of the march style popularized by John Philip Sousa, with additional polyrhythms coming from African music. John Philip Sousa:  Because of his mastery of march composition, he is known as "The March King", or the "American March King" due to his British counterpart Kenneth J. Alford also being known by the former nickname.
i don't know