It was originally constructed to prevent foreign invasion, specifically from the Mongolians. Hope this helps!
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It had many causes, but there were two main issues that split the nation: first was the issue of slavery, and second was the balance of power in the federal government. The South was primarily an agrarian society. The North, and many people in the South, also felt that slavery should be abolished for moral reasons.
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A.) Allies and the Americans bought land from the French called the Louisiana Purchase in 1803
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South African War, also called the Second Boer War or the Second War of Independence. A war fought from October 11, 1899, to May 31, 1902
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