The original Spanish explorers brought horses to North America. Many of those horses were turned loose when the Spaniards returned to Spain and they intermingled with native horses (horses that came from China over the ice cap). The Mustang is the result of that interbreeding. The first importation of Spanish Arabian horses was in 1934 when James and Edna Draper (from California) imported the first purebred Arabian horses to the United States.
The Spaniards!
it was introduced in the US in the 1960s
I think horse.
the horse
The introduced the horse and the chariot
in the us
The Great Plains was virtually devoid of human presence until the Spanish introduced the horse and gun.
The Eohippus horse was the firsthorse to help us!
2000
Pistol Pete, the Cowboy's mascot, was first introduced in 1958. His horse Bullet was introduced in 1984.
ROdney Brown introduced it.
The raccoon dog did not migrate to the US it was introduced from East Asia (or from a previously introduced population in Europe). In Europe they were introduced for their fur, and also as pets. In the US it is likely they were introduced as pets, but furbearing is a possibility.