Because of the uniqueness of a warhorse's job nature, most of the stallions will be gelded. Gelded warhorses were more docile and easier to tame, making them simpler to control.
A small number of stallions of excellent bloodline would be kept for breeding purposes to ensure that the next generation produced would be of the best possible quality.
The present king of the royal court of the northern kingdom couldn't really be considered a wise and brave man, but he was ambitious, and he was open to accepting advice from other people. As suggested by the Sage, he reformed the business alliance, and the resources of the ranches were tightly controlled in the hands of the Royal Court. Sale of warhorses was regulated.