They where big trading cities that many people wanted to control and because of it geographic location it was used as a cultural hearth
For the answer to the question above, <span>Chinese leaders have been able to do all of the followings since the death of mao Zedong except to </span><span>reestablish a democratic government.
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The Northwest Ordinance of 1787, allowed for Westward Expansion, and was to raise money that the America's received through the Treaty of Paris, and it created and organized the Northwest Territory.