Léonide Massine
Ballet Russe de Monte-Carlo initially began because Léonide Massine, the choreographer of Colonel Wassily de Basil's Ballets Russes, desired to be more than just Colonel Wassily de Basil's right-hand man. De Basil was the artistic director of his Ballet Russes, and Massine desired that position, so he broke off to start his own company.