When was jazz music first introduced?

The roots of jazz can be traced back to the late 19th and early 20th centuries in African-American communities in the Southern United States. It is believed to have originated in the late 1890s in New Orleans, Louisiana, as a fusion of African musical traditions with European music, particularly the brass band tradition of the military and marching bands.

Jazz first gained popularity in the early 20th century through New Orleans jazz, pioneered by musicians such as Louis Armstrong, Jelly Roll Morton, and Sidney Bechet. It later spread to other parts of the United States and eventually to the rest of the world.

The term "jazz" itself is thought to have originated in the early 20th century as slang used by African-Americans, but its exact origin and meaning are uncertain. By the 1930s, the term "jazz" was widely used to refer to the genre of music that had developed from its early roots in New Orleans.