What role did the Yam play in the expansion of the Mongol Empire?

was a postal system or supply point route messenger system extensively used and expanded by Ögedei Khan and also used by subsequent Great Khans and Khans. Relay stations provided food, shelter and spare horses for Mongol army messengers.

Explanation:

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sep 30, 2009 - what is the best description of trade among northwest indians prior to the best answer: 1, indians traded among numerous groups for goods that came from indian government was strong and centered authority in an elected chief. a shaman as the white man called him was a healer and nothing else.