The Cavaliers Drum and Bugle Corps is a World Class competitive junior drum and bugle corps based in Rosemont, Illinois. The Cavaliers were one of the thirteen founding member corps of Drum Corps International and is a seven-time DCI World Champion. The Cavaliers are the only active all-male corps in the activity.

A modern drum and bugle corps is a musical marching unit consisting of brass instruments, percussion instruments, electronic instruments, and color guard. Typically operating as independent non-profit organizations, corps perform in competitions, parades, festivals, and other civic functions. Participants of all ages are represented within the corps activity, but the majority are between the ages of 13 and 22 and are members of corps within Drum Corps International.