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Thirteen colonies revolted against English rule and, with French assistance, won the ensuing war for independence.
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The North and South developed quite different economies. The plantation South relied on slavery and the North relied on water-powered factories. The two came into a conflict and the Civil War began (1861-1865).
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The nation plunged into a servere economic depression.
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America's isolation from war ended on December 7, 1941, when the Japanese staged a surprise attack on Pearl Habor.
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The attacks of 9/11 awakened America in such way they never thought possible. The whole world was in shock.
