The Three-In-One is a tradition forged in the early years of the band’s history from three distinct pieces of the University’s heritage. The Marching “ILLINI” formation was created by A.A. Harding and his assistants in the early 1920s, making it the oldest part of the Three-In-One. The marching drill for this formation originally consisted of a march down the field in a “Block I” formation, and a marching into the ILLINI formation once the band had marched back downfield. The present-day version of the Marching ILLINI is similar to the original, but is highlighted by an intricate countermarch that allows the band to form the ILLINI letter by letter as it marches back down the field.