The blues, initiated by slaves in the Mississippi Delta, was born somewhere in the middle of the cotton fields in the southern United States.
After the First World War, during the Great Depression, many black workers came to look for work in the northern capitals, particularly Chicago. It was in the city's most disadvantaged southern neighbourhood that this music developed in the 1930s.
This is how the blues made its appearance in the metropolis. Here, traditional blues was complemented by additional instruments. In this sense, it was no longer a single musician who played, but a group. The music became more rhythmic and urban.