After declaring Independence from Great Britain the 13 states joined together to create a -federalism
-amendment
-confederation

confederation

Think the articles of confederation

Explanation:

There is stabilizing effects of the Pax Mongolica on regions under Mongol control as it conquests of the Mongol Empire on the social, cultural and economic life of the inhabitants of the vast Eurasian territory that the Mongols conquered in the 13th and 14th centuries. It helped to ease the communication and commerce the unified administration that also helped to create and period of relative peace that followed the Mongols’ vast conquests.