The Spanish Mustang name was chosen in the 1950s by a group of men to preserve the old-type Spanish Mustangs. Robert E. Brislawn of Oshto, Wyoming headed this group of men. These Spanish Mustangs flourished in great numbers and roamed the western United States, but are now threatened by extinction. The group chose Mustangs that were the best examples of the breed that the Spaniards brought over to conquer the new world. These animals were selected from stock and less than suitable horses were culled out. The Spanish Mustangs have great endurance and hardiness with a great ability of survival. These horses were used as cavalry mounts and cow horses. The Spanish Mustang stands on average 14.2 hh. The Modern Spanish Mustang has retained many of the qualities of the breed that was first brought over by the Spanish.