The Genghis Khan's Secret Army of Miniature Horses - Apparently.
In 13th century Mongolia, Genghis Khan's armies used miniature horses, known as "dwarf horses" or "pony horses," which stood only 23-27 inches tall, to carry messengers and supplies. These tiny horses were bred specifically for their small size and endurance, allowing them to traverse mountainous terrain and navigate narrow valleys. Verifiable records of their use can be found in the writings of 13th-century historian Rashid-al-Din Hamadani.