Throughout the 19th century a large proportion of the horses were crossed with imported European Thoroughbred, coach and draft horse stallions, and a larger, coarser, long striding multi-purpose, saddle cart horse resulted. However, the crossbreeding nearly ruined the native Spanish horse type. In 1918, the Argentine breeders decided to create a pure-bred criollos registry, and the breeder's association was then formed in 1923. Much infighting occurred between the bands of Emilio Solanet and Enrique Crotto. The first promoted the Asian type crioulo and the latter the taller African type with a coarse convex head, fallen croup, thinner mane and tail.