The Mongol Postal System, known as the Yam, was an extensive and efficient network established by the Mongol Empire to facilitate communication and the swift transportation of messages across its vast territories. This system played a crucial role in maintaining control over the empire by allowing for rapid communication between different regions, supporting military coordination, and enhancing trade and diplomatic relations. The Yam included relay stations and mounted couriers, enabling messages to travel quickly and securely across the challenging landscapes of Eurasia.