Glenn Miller be mentored by other professional musicians. In the beginning, he was the main trombone soloist of the band. But when Jack Teagarden joined Pollack's band in 1928, Miller found that his solos were cut drastically. He realized that his future was in arranging and composing. He had a songbook published in Chicago in 1928 entitled "Glenn Miller's 125 Jazz Breaks for Trombone" by the Melrose Brothers. During his time with Pollack, he wrote several arrangements. He wrote his first composition, "Room 1411", with Benny Goodman, and it was released as a 78 by Brunswick Records under the name Benny Goodman's
Glenn Miller Orchestra months after his band ceased to exist. Miller began privately sending letters to the Armed Forces in attempts to lead a modern military band. Accepted into the United States Navy and later transferred to the Army Air Force, in early September, he broke the news to the band and later that month they played their last radio shows. Miller surrendered his Chesterfield radio slot to Harry James. Radio played a pivotal role in the success of Miller and His Orchestra. Featured heavily on the format during their existence, many of their earlier programs from such venues as the Paradise Restaurant,