A unitary system of government, or unitary state, is a sovereign state governed as a single entity. The central government is supreme, and the administrative divisions exercise only powers that the central government has delegated to them.
Genghis forged the empire by uniting the nomadic tribes of the Asian steppe and creating a devastatingly effective army based on fast, light, and highly coordinated cavalry. Expert horsemen and archers, the Mongols proved unstoppable, defeating armies in Iran, Russia, Eastern Europe, China, and many other places.
Answer:
the U.S. Constitution through the commerce clause gives congress exclusive power over trade activities between the states and with foreign countries trade within a state is regulated exclusive by the states themselves
