During the Civil War, when soldiers from across the country commingled, the multifarious strands of American music began to cross-fertilize each other, a process that was aided by the burgeoning railroad industry and other technological developments that made travel and communication easier. Army units included individuals from across the country, and they rapidly traded tunes, instruments and techniques. The war was an impetus for the creation of distinctly American songs that became and remained wildly popular. The most popular songs of the Civil War era included "Dixie", written by Daniel Decatur Emmett. The song, originally titled "Dixie's Land", was made for the closing of a minstrel show; it spread to New Orleans first, where it was published and became "one of the great song successes of the pre-Civil War period". In addition to popular patriotic songs, the Civil War era also produced a great body of brass band pieces.