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Wilson defeated incumbent Republican William Howard Taft and third-party nominee Theodore Roosevelt to easily win the 1912 United States presidential election, becoming the first Southerner to do so since 1848.
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The assassination of Archduke Franz Ferdinand, heir to the Austro-Hungarian throne, and his wife Sophie in Sarajevo (the capital of the Austro-Hungarian province of Bosnia-Herzegovina) on 28 June 1914 eventually led to the outbreak of the First World War.
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In August 1914, President Woodrow Wilson proclaimed the United States' neutrality in World War I, urging Americans to remain impartial in both thought and action. This initial stance reflected a long-standing American policy of non-intervention in European conflicts and was supported by many Americans, including large German and Irish-American communities.
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The sinking of the British ocean liner RMS Lusitania on May 7, 1915, by a German U-boat was a pivotal event of World War I. The attack killed nearly 1,200 people, including 128 Americans, and fueled anti-German sentiment that helped pave the way for the United States to enter the war.