How did Duke Ellington gain worldwide popularity?

Duke Ellington gained worldwide popularity through his innovative compositions and distinctive big band sound, which blended jazz with various musical styles. His performances at prestigious venues, such as the Cotton Club in Harlem and later at international tours, showcased his talent and helped elevate jazz to a global audience. Additionally, his collaborations with notable musicians and his skillful arrangements contributed to his reputation as a leading figure in jazz, making him an influential ambassador of the genre.