When war broke out in August 1914, it was viewed with a mixture of disbelief and disinterest by Americans The government’s official stance of neutrality was widely supported by the general public, but at the same time there were also voices arguing for preparedness, and once Congress declared war on Germany in 1917, voices against American involvement were quickly silenced. This fundamental shift in public opinion from neutrality to total support for the war effort is mirrored in American sheet music from 1914 to 1919. During the war over 30,000 songs were composed and copyrighted, many in editions of thousands of copies. Sung in parlors, theaters, and bars, these songs — though not a part of official propaganda — had an undeniable impact on the American public’s attitude toward the country’s involvement in the war.

Operetta not only transferred across borders but also from one media platform to another, a characteristic of industrialized production termed ‘intermediality’. A stage show was a multilayered communication medium that connected to other media, such as sheet music, records, film, and radio. The term ‘remediation’ refers to a change from one medium to another, and there were various ways in which the music of operetta might be remediated. For example, it could be turned into sheet music for private pleasure playing the home piano, or, reemerge as a military band medley for the enjoyment of the public spending a leisurely afternoon in the park. Player pianos and piano rolls, which had been produced all around the globe, faced a period of decline in the1930s, as attention turned to radio and records. The arrival of radio effected a change in music dissemination and made the collection of performing rights imperative. Operettas provided the subject matter of a number of classic films of the silent era, and sound film operetta was also in demand in the 1930s, giving rise to the new genre of screen operetta.

It is clear that the productions in the West End and on Broadway of The Merry Widow marked a distinctive new phase in operetta reception. The massive success of The Merry Widow opened up a flourishing market for operettas from Vienna and Berlin. This was confirmed by the huge success of Straus’s The Chocolate Soldier in New York (1909) and London (1910). The Berlin operettas of Jean Gilbert were soon in demand in the West End and on Broadway. Continental European operetta entered a marketplace dominated by musical comedy. The first major blow to the operetta market, especially in the UK, was the outbreak of the First World War. After the war, many creators of operetta were eager to escape to the comfort of historical romances. In the first three decades of the twentieth century, many people were prepared to pay for operetta, and an assortment of theatres and ticket prices enabled a broad social mixture to do so. In addition to critical-aesthetic reception, theatrical productions were open to moral concerns. The chapter ends with reflections on the reasons for the decline in productions on Broadway and in the West End post-1933.