The modern natural horsemanship movement, though not originally described as such, developed primarily in the United States Pacific Northwest and Rocky Mountain states, where the "buckaroo" or "vaquero"-style cowboy tradition was the strongest. Brothers Tom and Bill Dorrance were early modern practitioners, who had background in the Great Basin buckaroo tradition. They had a particularly strong influence on Ray Hunt, who in turn became a significant influence upon Buck Brannaman. Many practitioners claim influence from the Dorrance brothers and Hunt, some having trained directly with these individuals. Other practitioners, such as Pat Parelli, came from the rodeo world.