Jazz is a genre of music that focuses on its style and loose sound, that was started in the early 1900's in Southern areas such as Louisiana by African-Americans. Instruments used in early jazz were saxophones, trumpets, trombones, clarinets, drums, flute, piano, guitar, double base, tubas, vocals, and vibraphones. Jazz came along, and was started, with blues in which African-Americans wrote and played music to express themselves, and this lead to many different forms of jazz later on in time.
During the Jim Crow Era, African-Americans were treated very poorly for being free men, and this brought depression to many of them. There was segregation for almost everything in the South, including in church and music. The jazz and blues were there for the blacks, that they started and kept for an "In your face" example to show that they had hope and they could express themselves.

Jazz and Blues was a big part in helping African-Americans make it through, and bearable, in life for the Jim Crow Era.