 Sousa's magnum opus, "The Stars and Stripes Forever" was adopted in 1987 as the national march of the United States.Sousa was prolific as both composer and orchestrator, writing 137 marches and more than 80 significant pieces, including operettas, overtures, suites, dances, and fantasies, and publishing some 322 arrangements of nineteenth-century western European symphonic works.He directed the design and production of his namesake instrument, the sousaphone, for its specialized adaption for use in a marching band.