 The Comanche supplied horses and mules to all comers.As early as 1795, Comanches were selling horses to Anglo-American traders  and by the mid-19th century, Comanche supplied horses were flowing into St. Louis via other Indian middlemen (Seminole, Osage, Shawnee).Their original migration took them to the southern Great Plains, into a sweep of territory extending from the Arkansas River to central Texas.