Upon his graduation in 1910, his operetta, "A Millionaire's Caprice," had its premiere on July 26, 1910, at the Teatro Eldorado of Naples and was produced throughout Italy.
The same year DeLeone returned to America, to be Director of Music in the Municipal University at Akron, Ohio.
[1] During his career DeLeone composed cantatas, songs, and works for piano in addition to opera and operettas.
[2] The plot was based upon a Native American story; the librettist, Cecil Fanning, drew inspiration from experiences, observations and research during several seasons spent on the Crow reservation in Montana.
The composer also received from King Victor Emmanuel III of Italy the title of Chavalier of the Order of the Royal Crown, in recognition of his success in operatic composition.