Which breeds of horse originated in Czechoslovakia?

There are no horse breeds that originated specifically in Czechoslovakia. However, the Czech Warmblood is a breed developed in the Czech Republic, which was part of Czechoslovakia until 1993.

While the Czech Warmblood is a relatively new breed, it's important to note that horse breeding has a long history in the region. Historically, various breeds were likely present and influenced the development of the Czech Warmblood.

Therefore, while no breed is specifically "Czechoslovakian," the Czech Warmblood is a significant breed developed in the region that reflects the long tradition of horse breeding in the area.