LLANO ESTACADO • FREE-TRANSLATOR.COM • Definition of Llano Estacado

... certainly when the prairie tribes were discovered, the men and animals lived in constant interaction, and many of the hunters acted and thought only as they were moved by their easy prey. As the Spanish horse spread northward over the Llano Estacado and overflowed across the mountains from the plains of the Cayuse, the Dakota and other tribes found a new means of conquest over the herds, and entered on a career so facile that they increased and multiplied despite strife ...

— The Siouan Indians • W. J. McGee