The Andalusian came to the America's on Christopher Columbus second voyage as ordered by Queen Isabella, that all ships that were bound for the new world must carry 12 breeding pairs of Andalusian.  A great many horses perished in ship wrecks but many survived.  When the Spanish arrived on there war mounts the Indians thought they were one great being and were aw struck. 

Many of the North and South American breeds carry the Spanish blood, the Paso Fino, Lipizzan, Friesian, Mustang and many other breeds carry the Spanish blood.  It has even been said that the American Quarter horse got his cow since from the Spanish. 

The Andalusian crosses well with other breeds to strengthen bone, carriage, movement, beauty and Brio.