Early rodeo-like affairs of the 1820s and 1830s were informal events in the western United States and northern Mexico with cowboys and "vaqueros" testing their work skills against one another. Following the American Civil War, rodeo competitions emerged, with the first held in Cheyenne, Wyoming in 1872. Prescott, Arizona claimed the distinction of holding the first professional rodeo, as it charged admission and awarded trophies in 1888. Between 1890 and 1910, rodeos became public entertainment, sometimes combined Wild West shows featuring individuals such as Buffalo Bill Cody, Annie Oakley, and other charismatic stars. By 1910, several major rodeos were established in western North America, including the Calgary Stampede, the Pendleton Round-Up, and the Cheyenne Frontier Days.