Maurice Yvain (1891–1965) was a French composer and conductor, primarily known for his contributions to operetta and musical theatre. He was a prominent figure in the French operetta scene during the early to mid-20th century, composing works that blended elements of classical music with popular styles of the time. Yvain's notable works include "L’Escadrille volante" (1925), which showcased his ability to combine catchy melodies with engaging storytelling, and "Le Roi des Montagnes" (1930), a piece that highlighted his flair for dramatic and romantic themes. His works often featured lively orchestration and memorable tunes that resonated with audiences, earning him a respected place in the operetta genre. His impact on music can be seen in the way he helped popularize the operetta form in France, influencing subsequent composers and the evolution of musical theatre. Yvain's compositions reflect the cultural landscape of his time, bridging the gap between classical traditions and contemporary popular music. Though he may not be as widely recognized today, his contributions to the operetta genre remain significant in the history of French musical theatre.