The Butterfield Blues Band was an American blues band formed in 1963 in Chicago. Led by harmonica player and singer Paul Butterfield, the band played a significant role in popularizing blues music in the 1960s. They were known for their energetic performances and a unique blend of blues, rock, and jazz influences. The band released several influential albums, including *East-West* and *The Paul Butterfield Blues Band*. They featured talented musicians such as guitarist Mike Bloomfield and drummer Elvin Bishop. The Butterfield Blues Band helped pave the way for future blues-rock artists and contributed to the vibrant music scene of the era.