The tribute system was a network of trade and diplomatic relations that established a hierarchical relationship between the Mongol Empire and the states it conquered or influenced. This system required subjugated regions to pay tribute, often in the form of goods or services, as a sign of their loyalty and acknowledgment of Mongol authority. It served not only as a means of generating revenue for the Mongol rulers but also reinforced their power over diverse populations across China, Persia, and Russia.