Which popular music style was a modification of the marches from "The March King" with heavy influences from African American communities?
Ragtime:  The style has its origins in African-American communities in cities such as St. Louis. 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.
i don't know