Which full-length black musical comedy was the first actual musical and challenged the old custom of white actors?

The first full-length black musical comedy that challenged the tradition of employing white actors was "In Dahomey," which premiered in 1903. Written by African American duo Bert Williams and George Walker, it was groundbreaking for featuring an all-black cast and addressing themes relevant to the black experience. This musical helped pave the way for future productions in the genre, showcasing the talent and creativity of black performers.