モンゴルで馬が戦に使われ始めたのはいつ
Mongolia holds more than 3 million horses, an equine population which outnumbers the country's human population. The horses live outdoors all year at in summer down to in winter, and search for food on their own. The mare's milk is processed into the national beverage airag, and some animals are slaughtered for meat. Other than that, they serve as riding animals, both for the daily work of the nomads and in horse racing. Mongol horses were a key factor during the 13th century conquest of the Mongol Empire.
13th century