Final answer:
James Reese Europe was both a black musician who brought ragtime to white audiences and the leader of the 369th Infantry Band, the 'Harlem Hellfighters', during WWI.
Step-by-step explanation:
James Reese Europe was a black musician who performed ragtime for white dance instructors and the leader of the 369th Infantry Band, or "Hellfighters," during World War I. He was a pivotal figure in bridging the racial divides in music, primarily in the context of ragtime and jazz. Europe's contributions are notable both in terms of his musical innovations and his role as a band leader during a time of heightened racial tensions and significant social change in America. His work with the "Harlem Hellfighters" helped to elevate the status of African American musicians and influenced the acceptance and spread of their music among broader audiences.