World War I took the United States out of a recession into a 44-month economic boom. 30 Before the war, America had been a debtor nation. After the war, it became a lender, especially to Latin America. U.S. exports to Europe increased as those countries geared up for war.
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<span>Foremost, the Mongols produced a charismatic leader, Genghiz Khan, who united the Mongol tribes in a dream of conquest and expansion.</span>