In reality, the American Warmblood isn't considered a breed as where the Morgan, Thoroughbred, or Arabian horses are. In fact, the term Warmblood is just a way to differentiate between cold bloods and hot bloods. The Warmblood is actually considered a group of sport horses. They are specifically bred to compete in such events as dressage, show jumping, and combined driving. The American Warmblood is called this because of the country of origin, as other warmbloods are named after the country of their origin.
The early warmbloods were often used as cavalry, riding, and carriage horses. In order to be registered, warmbloods are put through a battery of tests to rate performance and all around ride ability.
The American Warmblood Registry wasn't formed until 1981, the American Warmblood, in order to be registered with the association must have been born in the United States, Mexico, or Canada. The horses breeders of America have come to the conclusion that all European Warmbloods just intermingled and do not necessarily represent completely different breeds. Instead of splitting all the types in America, all Warmbloods in the country are grouped into one registry. If the horse can't meet the requirements in order to be registered, they are still given recording papers but are not considered an official part of the registry.
The breeding stock of the American Warmblood must meet a criterion of inspections and evaluations; their performance ability in many different areas is one of the requirements to be considered an acceptable breeding horse. If a horse is 100% cold or hot-blooded they can't be registered, they can only be nominated if they are able to meet the registries standards. Almost all horses that are sport horses or warm blooded in some form can be eligible for registration in either the American Warmblood Registry or the American Warmblood Society.
If you are an Associate Member of the World Breeding Federation for Sport Horses, the American Warmblood Society promotes, records, represents, nominates, and registers horses for the Olympic Sports and Combined Driving.
Since it is bred with multiple other breeds to reap their benefits or inherit physical attributes, it is no surprise that the head of the American Warmblood bares a striking resemblance to the Thoroughbreds. The American Warmblood is actually a product of the centuries of breeding hot blooded with cold-blooded horses; the idea was to produce a very athletic horse.
The American Warmblood's development has been influenced by many European breeds, the Thoroughbred and the Arabian horses are big players in this development, as well as many other types of draft horses. Mostly any horse of any bloodline can be registered as a warmblood as long as it meets the standards set fourth by the registry.
American Warmbloods, just like other show horses, have made a name for themselves; one in particular is "CJ's Royal Command." In the dressage ring, he has scores that are constantly in the 70s and he was the winner of the 2005 silver medal for Training Level at the National American Warmblood Society Awards Ceremony.