The Purdue "All-American" Marching Band (or AAMB) is the marching band of Purdue University and the main source of auxiliary entertainment for Purdue Boilermakers football games. The AAMB is also the host band of the Indianapolis 500 race, having held the position since 1927. The band has grown from an original 5 members to 389 members. The three most distinctive features of the AAMB are the World's Largest Drum, the Purdue Golden Girl featured twirler, and the "Block P," the first marching band field formation created in 1907.