Calypso music
The first major stars of calypso started crossing over to new audiences worldwide in the late 1930s. Attila the Hun, Roaring Lion and Lord Invader were first, followed by Lord Kitchener, one of the longest-lasting calypso stars in history—he continued to release hit records until his death in 2000. 1944's "Rum and Coca-Cola" by the Andrews Sisters, a cover version of a Lord Invader song, became an American hit despite the song being a very critical commentary on the explosion of prostitution, inflation and other negative influences accompanying the American military bases in Trinidad at the time. Perhaps the most straightforward way to describe the focus of calypso is that it articulated itself as a form of protest against the authoritarian colonial culture which existed at the time.
Music history of the United States (1900–1940)
Jazz, blues, folk, country, and gospel, music from the Caribbean region also briefly became popular during the first half of the twentieth century. Trinidadian calypso, Argentinian tango and Dominican merengue and other styles influenced American popular music. Hawaiian music (especially slack-key guitar) enjoyed an early vogue in the 1910s, influencing the developing genre of country music (this is the source of the steel guitar sound that is characteristic of modern country).