The believe that the answer to the question asked above is that it<span> is decided by how many people are needed to give control of the district.</span>
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The Treaty of Tordesillas awarded Portugal African territories and present-day Brazil, whereas Spain was awarded the rest of the Americas, which greatly improved Spain's power and trade capabilities. It accurately describes the impact of the Treaty of Tordesillas on trade.
The Romans built roads everywhere they went.
It's extremely hard to count exactly how many there are, because many were destroyed, or new roads were built.
Where I got this
information: http://qa.answers.com/Q/What_did_the_Romans_build_in_the_Balkan_countries
Hope this helped! c: