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Influence on other breeds

Spain's worldwide military activities between the 14th and 17th centuries called for large numbers of horses, more than could be supplied by native Spanish mares. Spanish custom also called for mounted troops to ride stallions, never mares or geldings. Due to these factors, Spanish stallions were crossed with local mares in many countries, adding Spanish bloodlines wherever they went, especially to other European breeds.

Because of the influence of the later Habsburg families, who ruled in both Spain and other nations of Europe, the Andalusian was crossbred with horses of Central Europe and the Low Countries and thus was closely related to many breeds that developed, including the Neapolitan horse, Groningen, Lipizzaner and Kladruber. Spanish horses have been used extensively in classical dressage in Germany since the 16th century. They thus influenced many German breeds, including the Hanoverian, Holstein, East Friesian and Oldenburg. Dutch breeds such as the Friesian and Gelderland also contain significant Spanish blood, as do Danish breeds such as the Frederiksborg and Knabstrupper.

Andalusians were a significant influence on the creation of the Alter Real, a strain of the Lusitano, and the Azteca, a Mexican breed created by crossing the Andalusian with American Quarter Horse and Criollo bloodlines. The Spanish jennet ancestors of the Andalusian also developed the Colonial Spanish Horse in America, which became the foundation bloodstock for many North and South American breeds. The Andalusian has also been used to create breeds more recently, with breed associations for both the Warlander (an Andalusian/Friesian cross) and the Spanish-Norman (an Andalusian/ Percheron cross) being established in the 1990s.