<span>The Northwest Ordinance established policies for the creation of new states. An Ordinance for the government of the Territory of the United States northwest .Be it ordained by the authority aforesaid, That there shall be appointed, not repugnant to the principles and articles in this ordinance established and declared.</span><span>
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<span>The United States gained full control of the Panama Canal in 1903 through the Hay-Bunau-Varilla Treaty with Panama helping Panama gain independence from Columbia.
Hope this helps!!</span>
I believe the answer is: They are based on the arbitrary borders of old European empires
African continent was colonized by different european empire. To avoid conflicts among the european, they divided africa into several territories and dtermine which country has the jurisdiction over each territories. After African nations gained independence, they still use this separation as borders to differentiate one country with another.
Executive authority to nullify or cancel provisions of a bill
