The Colts Drum and Bugle Corps (previously known as the Junior Dukes, Legionnaires, and Colt .45) is a World Class competitive junior drum and bugle corps based in Dubuque, Iowa.

[3] The Junior Dukes were sponsored by the local American Legion Post #6 and competed as a military style parade band.

[4] In 1971, the corps began to compete in VFW national competitions, earning as high as 5th place in 1973.

That same year Colt .45 joined Drum Corps International, taking 28th in their first championship competition.

[9] The Colts continue to compete as a member of Drum Corps International, earning their first finals spot in 1993.