Yam (in Mongolian: Ortooloh, "Ortoo" meaning checkpoint) is a supply point route messenger system employed and extensively used and expanded by Genghis Khan and used by subsequent Great Khans and Khans. Yams were used to give food, shelter and spare horses for Mongol armies messengers. Genghis Khan gave special attention to Yam because Mongol armies were known to ride almost 200 km in a couple of days. It was used to speed up the process of information and intelligence.
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